2021/09/16 <Announcement of the Observation request for RA researchers (for Dec., 2021)>
We will start accepting the observation request (from Dec. 6, 2021 to Jan. 2, 2022) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Dec. 6 (Mon), 2021 through Jan. 2 (Sun), 2022 (UT)
  *Period to accept observation requests : 15:00 Sep. 29 (Wed) through 14:59 Oct. 20 (Wed), 2021 (UT).
2021/09/14 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Thu. Sep. 30 - 08:00 Fri. Oct. 1, 2021 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2021/09/02 <On stopping the old version FTS SWIR L2 and L3 products>
We will stop distributing the following old versions FTS SWIR L2 and L3 products on 30 September 2021. Since they will be no longer available, please download them by 30 September 2021 if necessary.
  FTS SWIR L2/L3: V02.72, V02.75, V02.80
2021/09/01 <GOSAT TANSO-FTS observation restart after the reset operation>
The bias correction set value of Zero Path Difference (ZPD) position had been accumulated and reached the limit.
We suspended the FTS observation on August 24, 2021. After the FTS reset operation, the FTS observation restarted on August 26.

(1) The FTS observation was suspended from 2021-08-24 20:05:28 to 2021-08-26 02:39:24 (UT). (*)
(2) The FTS observation with 3-point grid mode restarted at 2021-08-26 02:39:25 (UT).
(3) The FTS nominal operation adding full target observations restarted on 2021-08-31 (UT).

(*)The FTS was temporally operated in "Observation mode 1 Day side" on August 25 to confirm the ZPD position after the reset operation.
2021/08/26 <Upgrade of Bias corrected FTS SWIR Level 2 and Level 3 CO2 Products>
Bias corrected FTS SWIR Level 2 and Level 3 CO2 Products have been upgraded as below. For the details, please refer to the release notes on "Documents & Technical Information" page.
1)Bias corrected FTS SWIR Level 2 CO2 Product
  Version: V02.97 (FTS L1B: V220.220) --> Observation Period: from 23 April 2009 to 31 May 2020
  Version: V02.98 (FTS L1B: V220.221) --> Observation Period: from 1 June 2020 to 31 July 2021
  Major change: Additional bias-corrections are conducted on only the bias-corrected XCO2 over ocean.
2)Bias corrected FTS SWIR Level 3 CO2 Product
  Version: V02.97 (FTS SWIR L2: V02.97) --> Observation Period: from June 2009 to May 2020
  Version: V02.98 (FTS SWIR L2: V02.98) --> Observation Period: from June 2020 to July 2021
  Major change: produced from the bias corrected FTS SWIR Level 2 CO2 Product V02.97 and V02.98.
2021/08/26 <Temporal observation suspension of GOSAT TANSO-FTS: FTS reset operation>
The bias correction set value of Zero Path Difference (ZPD) position has been accumulated and reached the limit.

We have operated the FTS standby mode and suspended the FTS observation at 20:05:28(UT) on August 24, 2021.

During the FTS restart procedure, we will apply only 3-point cross track grid observation.

We will notify users after restarting the FTS nominal operation, adding target observations.
2021/08/26 <Announcement of the Observation request for RA researchers (for Nov., 2021)>
We will start accepting the observation request (from Nov. 1 to Dec. 5, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Nov. 1 (Mon) through Dec. 5 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 Aug. 25 (Wed), 2021 through 14:59 Sep. 15 (Wed), 2021 (UT).
2021/08/20 <To RA users>
FTS TIR Level 2 H2O Column Amount Product has been released to RA users. Ver. 01.20. FTS TIR Level 2 H2O Column Amount Product is calculated using TIR L2 products(V01.20) based on FTS L1B product (Ver. 161.160) and, stores the H2O column amount, the H2O dry air mixing ratio, the dry air column amount, and the a priori H2O column amount. As with the TIR L2 products (V01.20), the observation period from April 23, 2009 to May 24, 2014 is covered.
For the details, please see "V01.20 for RA (release of H2O column amount)" at "Important Notes at Releasing" in "FTS L2 CO2 profile / CH4 profile/ H2O column amount (TIR)" on "Documents & Information" page after the login.
2021/07/28 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of upcoming outage of GDAS for Power Saving and the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  04:00 Fri. Aug. 6 - 04:00 Mon. Aug. 16, 2021 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2021/07/26 <Announcement of the Observation request for RA researchers (for Oct., 2021)>
We will start accepting the observation request (from Oct. 4 to Oct. 31, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Oct. 4 (Mon) through Oct. 31 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 July 28 (Wed), 2021 through 14:59 Aug. 18 (Wed), 2021 (UT).
2021/07/14 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  01:00 - 08:00 Mon. July 19, 2021 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2021/07/12 <Announcement of GDAS System Service Recovery>
GDAS stopped due to a power outage around 7:55 on 11 July, 2021(UT).
It was recovered around 7:02 on 12 July, 2021(UT) and the services were restarted as usual.
We apologize for the inconvenience.
2021/06/23 <Announcement of the Observation request for RA researchers (for Sep., 2021)>
We will start accepting the observation request (from Sep. 6 to Oct. 3, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Sep. 6 (Mon) through Oct. 3 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 June 30 (Wed), 2021 through 14:59 July 21 (Wed), 2021 (UT).
2021/06/18 <Release of V230.231 FTS L1B product>
FTS L1B product observed from June 13, 2021 has been upgraded from V230.230 to V230.231. For the details of the upgrade, please refer to the release note.
V230.231 product for each observation date will be released as soon as they are ready.
In addition, we will continue distributing the old version 220.221 FTS L1B product in parallel for the time being. However, the old version 230.230 FTS L1B product will continue to be distributed, but the data processing for the new observation date will be stopped.
2021/05/20 <Announcement of the Observation request for RA researchers (for Aug., 2021)>
We will start accepting the observation request (from Aug. 2 to Sep. 5, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Aug. 2 (Mon) through Sep. 5 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 May 26 (Wed), 2021 through 14:59 June 16 (Wed), 2021 (UT).
2021/05/19 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Thr. May 27, 2021 - 08:00 Fri. May 28, 2021 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2021/05/11 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  23:30 Sun. May 16 - 08:00 Wed. May 19, 2021 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2021/05/06 <Release of "GOSAT FTS SWIR L2 Drawing Tool">
NIES has started providing "GOSAT FTS SWIR L2 Drawing Tool" to draw scatter plots, time series plots, and global distribution plots using GOSAT FTS SWIR L2 products. To use this tool, please refer to the description and the manual at "GOSAT FTS SWIR L2 Drawing Tool" on Tool Page.
2021/04/28 <Announcement of the Observation request for RA researchers (for July, 2021)>
We will start accepting the observation request (from July 5 to Aug. 1, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : July 5 (Mon) through Aug. 1 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 Apr. 28 (Wed), 2021 through 14:59 May 19 (Wed), 2021 (UT).
2021/04/27 <Closing for the national holidays>
We are closing for the national holidays on 29 Apr. and from 1 May to 5 May, 2021 (JST). We will unable to respond to your inquiries and/or accept Authorized User registrations from 6:00 (UT) of the day before the holidays until our start time of the work.
Even while we are closing, following functions are still available for you:
access to information, product downloads, and observation requests by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2021/04/26 <Version Upgrade of L4 CO2 Products>
"L4A global CO2 flux" and "L4B global CO2 distribution" products have been released to General Users as version 02.07. They are based on version 02.95 of FTS SWIR L2 XCO2 data and the GLOBALVIEW surface-based CO2 data and cover 125 months between June 2009 and October 2019.
For the detail, please see "L4A global CO2 flux / L4B global CO2 distribution" > "Important Notes at Releasing V02.07 for GU" on "Documents & Information" page.
We have stopped distributing the old version 02.05 L4 CO2 products.
2021/04/19 <Maintenance Schedule in FY2021>
Maintenance Schedule in FY2021 was updated. For the detail, please refer to "Maintenance Schedule" under "News & Topics".
2021/03/22 <Announcement of the Observation request for RA researchers (for June, 2021)>
We will start accepting the observation request (from June 7 to July 4, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : June 7 (Mon) through July 4 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 Mar. 31 (Wed), 2021 through 14:59 Apr. 21 (Wed), 2021 (UT).
2021/03/16 <To RA users>
"L4A global CO2 flux" and "L4B global CO2 distribution" products have been released to RA users as version 02.07. They are based on version 02.95 of FTS SWIR L2 XCO2 data and the GLOBALVIEW surface-based CO2 data and cover 125 months between June 2009 and October 2019.
For the detail, please see "L4A global CO2 flux / L4B global CO2 distribution" > "Important Notes at Releasing V02.07 for RA" on "Documents & Information" page after the login.

<On stopping the old version 02.05 L4 CO2 products>
We will stop distributing the old version 02.05 "L4A global CO2 flux" and "L4B global CO2 distribution" products on 15 April 2021. Since they will be no longer available, please download them by 15 April 2021 if necessary.
2021/03/08 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 - 08:00 Thr. Mar. 18, 2021 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2021/03/03 <Apology for GDAS outage>
Thank you for using GOSAT Data Archive Service.
GDAS had stopped during the period around 12:08 to 23:15 on 2 March 2021 (UT) because of an unexpected system error.
The system has already been recovered, however, if you have any trouble in relation to this outage, please contact GOSAT support.
We apologize for any inconvenience this may have caused.
2021/02/24 <Announcement of the Observation request for RA researchers (for May, 2021)>
We will start accepting the observation request (from May 3 to June 6, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : May 3 (Mon) through June 6 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 Feb. 24 (Wed), 2021 through 14:59 Mar. 17 (Wed), 2021 (UT).
2021/02/01 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for NIES network device update.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  07:00 Fri. Feb. 5 - 01:00 Mon. Feb. 8, 2021 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2021/01/26 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 - 08:00 Thr. Jan. 28, 2021 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2021/01/21 <Announcement of GDAS System Service Outage Postponement>
We would like to infrom you that GDAS system outage for NIES network device update is postponed.
Users can continue to the services.
Thank you for your cooperation and understanding.
2021/01/18 <Announcement of the Observation request for RA researchers (for Apr., 2021)>
We will start accepting the observation request (from Apr. 5 to May 2, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Apr. 5 (Mon) through May 2 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 Jan. 27 (Wed), 2021 through 14:59 Feb. 17 (Wed), 2021 (UT).
2021/01/15 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for NIES network device update.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  07:00 Fri. Jan. 22 - 01:00 Mon. Jan. 25, 2021 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2021/01/15 <3rd GOSAT RA Application Due Extended until March 15, 2021>
In consideration of the current situation regarding the COVID-19 spread in Japan and overseas, the application deadline of the Third Research Announcement on Greenhouse Gases Observing SATellite Series (3rd GOSAT RA) is extended until Monday, March 15, 2021.
Please note that the proposals received by the initial deadline of January 15, 2021 will be evaluated as initially scheduled.
http://www.nies.go.jp/soc/en/ra/ra03/ (Satellite Observation Center site)

Issue of Research Announcement: Friday, November 13, 2020
Proposal Submission Deadline (initial): Friday, January 15, 2021
Notification of Selection Results (initial): Friday, April 30, 2021 or later
Proposal Submission deadline (after extension): Monday, March 15, 2021
Notification of Selection Results (after extension): Friday, June 11, 2021 or later
2021/01/04 <On 3rd GOSAT Series Research Announcement>
The Third Research Announcement on Greenhouse Gases Observing SATellite Series (3rd GOSAT RA) was released on Nov. 13, 2020 and is now open for proposal submission until Friday, January 15, 2021.
For the detail, please see http://www.nies.go.jp/soc/en/ra/ra03/ (Satellite Observation Center site).
2020/12/28 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for NIES network device update.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Fri. Jan. 8 - 01:00 Tue. Jan. 12, 2021 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2020/12/25 <Version Upgrade of L4 CH4 Products>
"L4A global CH4 flux" and "L4B global CH4 distribution" products have been released to General users as version 01.05. They are based on version 02.90 FTS SWIR L2 XCH4 data and the WDCGG ground-based observational data etc, and cover 112 months between June 2009 and September 2018.
For the detail, please see "Important Notes at Releasing V01.05 for GU" in "L4A global CH4 flux / L4B global CH4 distribution" table on "Documents & Information" page.
2020/12/21 <Closing at Year Ends and New Year>
We are closing for the New Year holiday between 28 Dec. 2020 and 3 Jan. 2021 (JST). We will unable to respond to your inquiries and/or accept authorized user registrations from 6:00 (UT) on 28 Dec. 2020 until 00:00 (UT) on 4 Jan. 2021.
Even while we are closing, following functions are still available for you:
access to information, general user registrations and product downloads by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2020/12/17 <On stopping the old version 01.03 L4 CH4 products (Rescheduled)>
We will stop distributing the old version 01.03 "L4A global CH4 flux" and "L4B global CH4 distribution" products on 23 December 2020. Since they will be no longer available, please download them by 23 December 2020 if necessary.
2020/11/30 <Temporal observation suspension of GOSAT TANSO-FTS and CAI due to the GOSAT maneuver operation>
We would like to inform you that the GOSAT maneuver operation has performed on November 24, 2020. Accordingly, GOSAT TANSO-FTS and CAI observations have been suspended during the following periods:

TANSO-FTS
(1) 2020/11/24 15:10:54~2020/11/26 02:38:20(UT)
(2) 2020/11/26 17:14:57~2020/11/28 03:43:53(UT)
TANSO-CAI
(1) 2020/11/24 14:29:46~2020/11/26 03:18:23(UT)
(2) 2020/11/26 17:13:30~2020/11/28 04:23:56(UT)

All GOSAT observations have been canceled during these periods. We are sorry for any inconvenience this may cause you.
Thank you for your understanding for this issue.
2020/11/26 <Important notice for the temporally observation stop of TANSO-FTS and CAI for the GOSAT maneuver operation>
We would like to inform you that the GOSAT maneuver operation is scheduled for the following periods:

(1) 2020/11/24 15UT - 2020/11/26 02UT
(2) 2020/11/26 17UT - 2020/11/28 04UT

All GOSAT observations will be suspended during the periods. We are sorry for any inconvenience this may cause you. GOSAT observation will re-start as soon as the maneuver is completed.
Thank you for your understanding for this issue.
2020/11/24 <Announcement of the Observation request for RA researchers (for Feb., 2021)>
We will start accepting the observation request (from Feb. 1 to Feb. 28, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Feb. 1 (Mon) through Feb. 28 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 Nov. 25 (Wed), 2020 through 14:59 Dec. 16 (Wed), 2020 (UT).
2020/11/17 <To RA users>
"L4A global CH4 flux" and "L4B global CH4 distribution" products have been released to RA users as version 01.05. They are based on version 02.90 FTS SWIR L2 XCH4 data and the WDCGG ground-based observational data etc, and cover 112 months between June 2009 and September 2018.
For the detail, please see "Important Notes at Releasing V01.05 for RA" in "L4A global CH4 flux / L4B global CH4 distribution" table on "Documents & Information" page after logging into GDAS.

<On stopping the old version L4 CH4 products>
We will stop distributing the old versions of "L4A global CH4 flux" and "L4B global CH4 distribution" products on 13 December 2020. Since they will be no longer available, please download them by 13 December 2020 if necessary.
2020/11/13 <Release of V230.230 FTS L1B product>
FTS L1B product observed from November 11, 2020 has been upgraded after V220.221 to V230.230. For the details of the upgrade to V230.230 FTS L1B product, please refer to the release note.
V230.230 products for the other observation period will be released as soon as they are ready.
In addition, we will continue distributing the old version 220.221 FTS L1B products in parallel for the time being.
2020/11/06 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the system maintenance and the legal inspection of the electric installation.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  04:00 Wed. Nov. 18 - 04:00 Tue. Nov. 24, 2020 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2020/10/22 <Announcement of the Observation request for RA researchers (for Jan., 2021)>
We will start accepting the observation request (from Jan. 4 to Jan. 31, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Jan. 4 (Mon) through Jan. 31 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 Oct. 28 (Wed), 2020 through 14:59 Nov. 18 (Wed), 2020 (UT).
2020/10/02 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the legal inspection of the electric installation.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Fri. Oct. 16 - 04:00 Mon. Oct. 19, 2020 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2020/09/28 <Announcement of the Observation request for RA researchers (for Dec., 2020)>
We will start accepting the observation request (from Dec. 7, 2020 to Jan. 3, 2021) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Dec. 7 (Mon), 2020 through Jan. 3 (Sun), 2021 (UT)
  *Period to accept observation requests : 15:00 Sep. 30 (Wed), 2020 through 14:59 Oct. 21 (Wed), 2020 (UT).
2020/09/07 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of upcoming outage of GDAS for system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Thu. Sep. 24 - 08:00 Fri. Sep. 25, 2020 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2020/08/28 <Announcement of the Observation request for RA researchers (for Nov., 2020)>
We will start accepting the observation request (from Nov. 2, 2020 to Dec. 6, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Nov. 2 (Mon), 2020 through Dec. 6 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 Aug. 26 (Wed), 2020 through 14:59 Sep. 16 (Wed), 2020 (UT).
2020/08/26 <Upgrade of Bias corrected FTS SWIR Level 2 and Level 3 Products>
Bias corrected FTS SWIR Level 2 and Level 3 Products have been upgraded as below. For the details, please refer to the release notes on "Documents & Technical Information" page.
1)Bias corrected FTS SWIR Level 2 Product
  Version: upgraded to V02.96
  Observation Period: from 1 June 2020 to 31 July 2020
  Major change: FTS SWIR Level 2 Product V02.91 is bias-corrected and upgraded to V02.96.
2)Bias corrected FTS SWIR Level 3 Product
  Version: upgraded to V02.96
  Observation Period: June 2020 to July 2020
  Major change: produced from the bias corrected FTS SWIR Level 2 Product V02.96.
2020/08/24 <Upgrade of the FTS SWIR Level 2 and Level 3 Products>
FTS SWIR Level 2 and Level 3 Products have been upgraded as below. For the details, please refer to the release notes on "Documents & Technical Information" page.
1) FTS SWIR Level 2 Product
  Version: upgraded to V02.91
  Observation Period: 1 June 2020 to 31 July 2020
  Major change: changed the version of FTS Level 1 Products (input products) to V220.221.
2) FTS SWIR Level 3 Product
  Version: upgraded to V02.91
  Observation Period: June 2020 to July 2020
  Major change: produced from the FTS SWIR Level 2 products V02.91.
2020/07/30 <Announcement of the Observation request for RA researchers (for Oct., 2020)>
We will start accepting the observation request (from Oct. 5, 2020 to Nov. 1, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Oct. 5 (Mon), 2020 through Nov. 1 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 July 30 (Wed), 2020 through 14:59 Aug. 19 (Wed), 2020 (UT).
2020/07/29 <Release of FTS L1B Product V220.221>
The parameters of FTS L1B Product have been improved and the version number has been updated from V220.220 to V220.221. Among FTS L1B products for the period not provided previously, the products with the shift amount of the Zero Path Difference (ZPD) position over 2000 are also provided. For the details of the upgrade, please refer to the release note. Note that there is no change in the product format.
The products for the observation period from 1 June 2020 to 26 July 2020 are reprocessed and those from 26 July 2020 are processed in real time, and provided sequentially as they are ready. Regarding the old version 220.220 FTS L1B products, those for the period until 26 July 2020 are also provided.
2020/07/22 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of upcoming outage of GDAS for Power Saving and the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  04:00 Fri. Aug. 7 - 04:00 Mon. Aug. 17, 2020 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2020/07/15 <FTS observation restart and L1B data during the FTS ZPD shift event>
The FTS observation has been restarted from 18 June 2020. From June 13 to 17, the FTS observation was suspended due to the FTS interferometer reset operation. The spectral phase correction in the current FTS L1B processing does not support the Zero Path Difference (ZPD) shift over 2000. The affected data will be distributed after reprocessing with updating the parameter only for the latest V220.220.
(1) At this moment, the FTS L1B data was not distributed in the following periods. (ZPD shift > 2000)
  <1> from 2020-06-06 17:35:13 path29 scene43 to 2020-06-07 03:46:45 path03 scene56
  <2> from 2020-06-09 15:56:57 path26 scene42 to 2020-06-10 00:51:16 path44 scene09
  <3> from 2020-06-10 03:24:17 path03 scene43 to 2020-06-12 03:34:53 path05 scene09
  <4> from 2020-06-12 10:07:32 path17 scene09 to 2020-06-13 04:33:06 path06 scene25
(2) The FTS observation was suspended from 2020-06-13 04:33:09 to 2020-06-17 23:55:07.
(3) The FTS observation with 3-point grid mode has restarted from 2020-06-17 23:55.
(4) The FTS nominal observation adding full target observations has restarted from 2020-07-06.
2020/07/13 <Upgrade of the FTS SWIR Level 2 and Level 3 Products>
FTS SWIR Level 2 and Level 3 Products have been upgraded as below. For the details, please refer to the release notes on "Documents & Technical Information" page.
1) FTS SWIR Level 2 Product (Bias uncorrected)
  Version: upgraded to V02.90
  Observation Period: 23 April 2009 to 31 May 2020
  Major change: changed the version of FTS Level 1 Products (input products) to V220.220.
2) Bias corrected FTS SWIR Level 2 Product
  Version: upgraded to V02.95
  Observation Period: 23 April 2009 to 31 May 2020
  Major change: FTS SWIR Level 2 Product V02.90 is bias-corrected and upgraded to V02.95.
3) FTS SWIR Level 3 Product (Bias uncorrected)
  Version: upgraded to V02.90
  Observation Period: June 2009 to May 2020
  Major change: produced from the FTS SWIR Level 2 products V02.90.
4) Bias corrected FTS SWIR Level 3 Product
  Version: upgraded to V02.95
  Observation Period: June 2009 to May 2020
  Major change: produced from the bias corrected FTS SWIR Level 2 Product V02.95.
2020/06/26 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Wed. July 8 - 08:00 Thr. July 9, 2020 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2020/06/22 <Announcement of the Observation request for RA researchers (for Sep., 2020)>
We will start accepting the observation request (from Sep. 7, 2020 to Oct. 4, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Sep. 7 (Mon), 2020 through Oct. 4 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 July 1 (Wed), 2020 through 14:59 July 22 (Wed), 2020 (UT).
2020/06/15 <Temporal observation suspension of GOSAT TANSO-FTS: FTS reset operation>
The bias correction set value of Zero Path Difference (ZPD) position has been accumulated and reached the limit.
We have operated the FTS standby mode and suspended the FTS observation on June 13, 2020.
During the FTS restart procedure, we will apply only 3-point cross track grid observation.
We will announce after restarting the FTS nominal operation adding target observations.
2020/06/10 <On Reset of TANSO-FTS mechanism>
Since the launch, we have corrected Zero Path Difference (ZPD) position periodically by adding bias laser fringes.
As the bias set value has been accumulated, we are planning to reset TANSO-FTS mechanism.
During the reset procedure, we will apply only 3-point cross track grid observation from 11 June 2020.
2020/05/25 <Announcement of the Observation request for RA researchers (for Aug., 2020)>
We will start accepting the observation request (from Aug. 3, 2020 to Sep. 6, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Aug. 3 (Mon), 2020 through Sep. 6 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 May 28 (Wed), 2020 through 14:59 June 17 (Wed), 2020 (UT).
2020/05/12 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Thu. May 28, 2020 - 08:00 Fri. May 29, 2020 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2020/04/21 <Closing for the national holidays>
We are closing for the national holidays on 29 Apr. and from 2 May to 6 May, 2020 (JST). We will unable to respond to your inquiries and/or accept Authorized User registrations from 6:00 (UT) of the day before the holidays until our start time of the work.
Even while we are closing, following functions are still available for you:
access to information, product downloads, and observation requests by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2020/04/21 <Announcement of the Observation request for RA researchers (for July, 2020)>
We will start accepting the observation request (from July 6, 2020 to Aug. 2, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : July 6 (Mon), 2020 through Aug. 2 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 Apr. 30 (Wed), 2020 through 14:59 May 20 (Wed), 2020 (UT).
2020/04/10 <Distribution of FTS L1B product>
Due to the recent situation, distribution of FTS L1B product observed on April 4 and after April 8, 2020(UT) will be delayed for about one month.
We apologize for this and would like to ask your understanding.
2020/04/07 <Maintenance Schedule in FY2020>
Maintenance Schedule in FY2020 was updated. For the detail, please refer to "Maintenance Schedule" under "News & Topics".
2020/03/23 <Announcement of the Observation request for RA researchers (for June, 2020)>
We will start accepting the observation request (from June 1, 2020 to July 5, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : June 1 (Mon), 2020 through July 5 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 Mar. 25 (Wed), 2020 through 14:59 Apr. 15 (Wed), 2020 (UT).
2020/03/06 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 - 08:00 Wed. Mar. 18, 2020 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2020/02/21 <Announcement of the Observation request for RA researchers (for May, 2020)>
We will start accepting the observation request (from May 4, 2020 to May 31, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : May 4 (Mon), 2020 through May 31 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 Feb. 26 (Wed), 2020 through 14:59 Mar. 18 (Wed), 2020 (UT).
2020/01/16 <Announcement of the Observation request for RA researchers (for Apr., 2020)>
We will start accepting the observation request (from Apr. 6, 2020 to May 3, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Apr. 6 (Mon), 2020 through May 3 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 Jan. 29 (Wed), 2020 through 14:59 Feb. 19 (Wed), 2020 (UT).
2020/01/10 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Thu. Jan. 30 - 08:00 Fri. Jan. 31, 2020 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/12/24 <On stopping the old version FTS L1B, L2 and L3 products>
We will stop distributing the following old versions FTS L1B, L2 and L3 products on 20 January 2020. Since they will be no longer available, please download them by 20 January 2020 if necessary.
  FTS L1B: V201.202
  FTS SWIR L2/L3: V02.21,V02.25/V02.26,V02.31,V02.35/V02.36,
                  V02.40,V02.45/V02.46,V02.50,V02.60
2019/12/23 <Closing at Year Ends and New Year>
We are closing for the New Year holiday between 28 Dec. 2019 and 5 Jan. 2020 (JST). We will unable to respond to your inquiries and/or accept authorized user registrations from 6:00 (UT) on 27 Dec. 2019 until 00:00 (UT) on 6 Jan. 2020.
Even while we are closing, following functions are still available for you:
access to information, general user registrations and product downloads by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2019/12/20 <Announcement of the Observation request for RA researchers (for Mar., 2020)>
We will start accepting the observation request (from Mar. 2, 2020 to Apr. 5, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Mar. 2 (Mon), 2020 through Apr. 5 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 Dec. 25 (Wed), 2019 through 14:59 Jan. 15 (Wed), 2020 (UT).
2019/11/27 <Announcement of the Observation request for RA researchers (for Feb., 2020)>
We will start accepting the observation request (from Feb. 3, 2020 to Mar. 1, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Feb. 3 (Mon), 2020 through Mar. 1 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 Nov. 27 (Wed), 2019 through 14:59 Dec. 18 (Wed), 2019 (UT).
2019/11/18 <Announcement of Network Maintenance>
We would like to notify you of the urgent network maintenance.
During the following period, the services provided through GDAS will not be available for up to 60 minutes due to urgent network maintenance.
If users are not in a hurry, please use GDAS except for the maintenance period.
The period of network maintenance:
  15:00 - 18:00 Mon. Nov. 18, 2019 (UT)

Thank you for your cooperation and understanding.
2019/11/18 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Thu. Nov. 28 - 08:00 Fri. Nov. 29, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/11/06 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the legal inspection of the electric installation.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  04:00 Fri. Nov. 15 - 04:00 Mon. Nov. 18, 2019 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/10/21 <Announcement of the Observation request for RA researchers (for Jan., 2020)>
We will start accepting the observation request (from Jan. 6, 2020 to Feb. 2, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Jan. 6 (Mon), 2020 through Feb. 2 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 Oct. 30 (Wed), 2019 through 14:59 Nov. 20 (Wed), 2019 (UT).
2019/10/03 <Version Upgrade of L4 CO2 Products>
"L4A global CO2 flux" and "L4B global CO2 distribution" products have been released to General Users as version 02.06. They are based on version 02.75 of FTS SWIR L2 XCO2 data and the GLOBALVIEW surface-based CO2 data and cover 101 months between June 2009 and October 2017.
For the details, please see "Important Notes at Releasing V02.06 for GU" in "L4A global CO2 flux / L4B global CO2 distribution" table on "Documents & Information" page.
We have stopped distributing the old version 02.04 L4 CO2 products.
2019/10/02 <On Release of the FTS SWIR Level 3 Products (V02.81)>
The FTS SWIR Level 3 products of V02.81 during the period from June 2009 to August 2019 were released on October 2, 2019, which are produced from the FTS SWIR Level 2 products of V02.81.
To download the product, please open "Download" -> "L3 global CO2 distribution (SWIR)" or "L3 global CH4 distribution (SWIR)" page and select "V02.xx (Bias uncorrected)" after logging into GDAS.
For the details of this product, please refer to "Release Note" on "Documents & Technical Information" page.
2019/09/30 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the legal inspection of the electric installation.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  04:00 Fri. Oct. 18 - 04:00 Mon. Oct. 21, 2019 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/09/26 <Release of "Viewer for observation data of GOSAT series" and "GOSAT/GOSAT-2 Level 1 product reading toolkit">
JAXA provided "Viewer for observation data of GOSAT series" to display simply or to draw observation data on map of GOSAT-GOSAT-2 observation data and "GOSAT/GOSAT-2 Level 1 product reading toolkit" which is a programming library to read GOSAT/GOSAT-2 Level 1 product. To use these tools, please refer to the manuals and download them on Tools Page.
2019/09/24 <Announcement of the Observation request for RA researchers (for Dec., 2019)>
We will start accepting the observation request (from Dec. 2, 2019 to Jan. 5, 2020) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Dec. 2 (Mon), 2019 through Jan. 5 (Sun), 2020 (UT)
  *Period to accept observation requests : 15:00 Sep. 25 (Wed), 2019 through 14:59 Oct. 16 (Wed), 2019 (UT).
2019/09/24 <On Release of V02.81 FTS SWIR Level 2 Products>
The threshold of V02.80 FTS SWIR L2 products was revised and new version 02.81 FTS SWIR L2 product have been released to General Users.
For the details, please refer to the documents of "Release Note" etc on "Documents & Technical Information" page.
2019/09/11 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 - 08:00 Thu. Sep. 26, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/09/04 <Announcement of GOSAT Data Archive Service Network system maintenance>
We would like to notify you of the network system maintenance.
During the following period, the services provided through GDAS will be suspended within one minute.
The period of the network system maintenance:
  8:00 - 9:00 Thu. Sep. 12, 2019 (UT)

Thank you for your cooperation and understanding.
2019/08/23 <Announcement of the Observation request for RA researchers (for Nov., 2019)>
We will start accepting the observation request (from Nov. 4 to Dec. 1, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Nov. 4 (Mon), 2019 through Dec. 1 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 Aug 28 (Wed), 2019 through 14:59 Sep. 18 (Wed), 2019 (UT).
2019/08/19 <Announcement: Website services to provide GOSAT-2 products started.>
Regarding Greenhouse gases Observing SATellite-2 "IBUKI-2" (GOSAT-2, luanched on 29 October, 2018), an initial calibration of Level 1 data products, radiance spectrum and images was completed.
We began to release FTS-2 Level 1B and CAI-2 Level 1B products to general users from the website : "GOSAT-2 Product Archive".
Please access "GOSAT-2 Product Archive" to get GOSAT-2 products.
Moreover, please contact GOSAT-2 support (maildesk) for inquiries regarding GOSAT-2 product acquisition.
2019/07/24 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the urgent system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:15 - 04:45 Thu. July 25, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/07/24 <Apology for GDAS outage>
Thank you for using GOSAT Data Archive Service.
GDAS had stopped during the period around 6:25 to 6:40 on 23 Jul. 2019 (UT) because of an unexpected network error.
The system has already been recovered, however, if you have any trouble in relation to this outage, please contact GOSAT support.
We apologize for any inconvenience this may have caused.
2019/07/22 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of upcoming outage of GDAS for Power Saving and the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:00 Fri. Aug. 9 - 04:00 Mon. Aug. 19, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/07/22 <Announcement of the Observation request for RA researchers (for Oct., 2019)>
We will start accepting the observation request (from Oct. 7 to Nov. 3, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Oct. 7 (Mon), 2019 through Nov. 3 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 July 31 (Wed), 2019 through 14:59 Aug. 21 (Wed), 2019 (UT).
2019/07/16 <Release of V220.220 FTS L1B product>
FTS L1B product has been version-uped from V210.210 to V220.220. For the details of the upgrade to V220.220 FTS L1B product, please refer to the release note.
We will provide the products observed from July 10, 2019 as real-time and from April 2018 as reprocessing. V220.220 products for the other observation period will be released as soon as they are ready.
In addition, we will continue distributing the old version 210.210 FTS L1B products in parallel for the time being.
2019/07/10 <Announcement of GOSAT Data Archive Service temporary maintenance>
We would like to notify you of upcoming outage of GDAS for the temporary system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:00 - 07:00 Wed. July 17, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/07/05 <To RA users>
"L4A global CO2 flux" and "L4B global CO2 distribution" products have been released to RA users as version 02.06. They are based on version 02.75 of FTS SWIR L2 XCO2 data and the GLOBALVIEW surface-based CO2 data and cover 101 months between June 2009 and October 2017.
For the detail, please see "L4A global CO2 flux / L4B global CO2 distribution" > "Important Notes at Releasing V02.06 for RA" on "Documents & Information" page after the login.
2019/06/20 <Announcement of the Observation request for RA researchers (for Sep., 2019)>
We will start accepting the observation request (from Sep. 2 to Oct. 6, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Sep. 2 (Mon), 2019 through Oct. 6 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 June 26 (Wed), 2019 through 14:59 July 17 (Wed), 2019 (UT)
2019/05/17 <Announcement of the Observation request for RA researchers (for Aug., 2019)>
We will start accepting the observation request (from Aug. 5 to Sep. 1, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Aug. 5 (Mon), 2019 through Sep. 1 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 May 29 (Wed), 2019 through 14:59 June 19 (Wed), 2019 (UT)
2019/04/25 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:00 Fri. May 17, 2019 - 04:00 Mon. May 20, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/04/19 <Announcement of the Observation request for RA researchers (for July, 2019)>
We will start accepting the observation request (from July 1 to Aug. 4, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : July 1 (Mon), 2019 through Aug. 4 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 Apr. 25 (Wed), 2019 through 14:59 May 15 (Wed), 2019 (UT)
2019/04/15 <Closing for the national holidays>
We are closing for the national holidays from 27 Apr. to 6 May, 2019 (JST). We will unable to respond to your inquiries and/or accept Authorized User registrations from 6:00 (UT) of the day before the holidays until our start time of the work.
Even while we are closing, following functions are still available for you:
access to information, product downloads, and observation requests by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2019/04/05 <Maintenance Schedule in FY2019>
Maintenance Schedule in FY2019 was updated. For the detail, please refer to "Maintenance Schedule" under "News & Topics".
2019/03/28 <FTS L1B Product Download Procedure>
It is now possible to download FTS L1B products by a path unit. Please download according to the following procedure.
1. From the calendar on "FTS L1B Download page", click the version of the observation date you want to get.
2. The path selection screen is displayed.
1) To get daily data, select "All (Daily Data)" and click "Download".
2) To download path data, select the path you want to get and click "Download".
3) To get data using "wget" commands, use either of the following lists:
WGET list (V210.210) (List of one-day data archived with tar command)
WGET list (V210.210) (List of one-path data archived with tar command)
2019/03/25 <Announcement of the Observation request for RA researchers (for June, 2019)>
We will start accepting the observation request (from June 3 to June 30, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : June 3 (Mon), 2019 through June 30 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 Mar. 27 (Wed), 2019 through 14:59 Apr. 17 (Wed), 2019 (UT)
2019/03/15 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 - 03:00 Wed. Mar. 27, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/03/08 <On stopping the old version FTS L1B product and FTS estimated geolocation data distribution>
We will stop distributing the following old versions FTS L1B product and FTS estimated geolocation data on 25 March 2019. Since they will be no longer available, please download them by 25 March 2019, if necessary.
  FTS L1B : V161.160, V161.161
  FTS estimated geolocation data : V01.21, V01.21
2019/03/08 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Tue. Mar. 19 - 08:00 Wed. Mar. 20, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/03/06 <On Release of the Bias-corrected FTS SWIR Level 3 CH4 Products (V02.75)>
The bias-corrected FTS SWIR Level 3 CH4 products of V02.75 during the period from June 2009 to November 2018 were released, which are produced from the bias-corrected FTS SWIR Level 2 CH4 products of V02.75.
To download the product, please open "Download" -> "L3 global CH4 distribution (SWIR)" page and select "V02.x5 (Bias corrected)" after logging into GDAS.
For the details of this product, please refer to "Release Note" on "Documents & Technical Information" page.
2019/03/01 <On Release of Bias-corrected FTS SWIR Level 2 CH4 Product (V02.75)>
Using the ground-based observation data of the Total Carbon Column Observation Network (TCCON) (2009-2016), bias-corrections were conducted on the column amounts of methane (XCH4) of the SWIR L2 CH4 product during the period from April 23, 2009 to Nov. 24, 2018, and the results is released as the bias-corrected FTS SWIR Level 2 CH4 product.
To download the product, open "Download" > "L2 CH4 column amount (SWIR)" page and select "V02.x5 (Bias corrected)" after logging into GDAS, please. For the details of this product, please refer to "Release Note of Bias-corrected FTS SWIR Level 2 CH4 Product (V02.75) for General Users".
2019/02/18 <Announcement of the Observation request for RA researchers (for May, 2019)>
We will start accepting the observation request (from May 6 to June 2, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : May 6 (Mon), 2019 through June 2 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 Feb. 27 (Wed), 2019 through 14:59 Mar. 20 (Wed), 2019 (UT).
2019/02/08 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
23:00 Wed. Feb. 12 - 09:00 Thu. Feb. 13, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/02/01 <On Release of the FTS SWIR Level 3 Products (V02.80)>
The FTS SWIR Level 3 products of V02.80 during the period from June 2009 to November 2018 were released on February 1, 2019, which are produced from the FTS SWIR Level 2 products of V02.80.
To download the product, please open "Download" -> "L3 global CO2 distribution (SWIR)" or "L3 global CH4 distribution (SWIR)" page and select "V02.xx (Bias uncorrected)" after logging into GDAS.
For the details of this product, please refer to "Release Note" on "Documents & Technical Information" page.
2019/01/25 <On Release of the Bias-corrected FTS SWIR Level 3 CO2 Products (V02.75)>
The bias-corrected FTS SWIR Level 3 CO2 products of V02.75 during the period from June 2009 to November 2018 were released on January 25, 2019, which are produced from the bias-corrected FTS SWIR Level 2 CO2 products of V02.75.
To download the product, please open "Download" -> "L3 global CO2 distribution (SWIR)" page and select "V02.xx (Bias corrected)" after logging into GDAS.
For the details of this product, please refer to "Release Note" on "Documents & Technical Information" page.
2019/01/17 <Announcement of the Observation request for RA researchers (for Apr., 2019)>
We will start accepting the observation request (from Apr. 1 to May 5, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Apr. 1 (Mon), 2019 through May 5 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 Jan. 24 (Wed), 2019 through 14:59 Feb. 13 (Wed), 2019 (UT).
2019/01/11 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 - 08:00 Thu. Jan. 24, 2019 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2019/01/10 <Announcement of the observation restart of GOSAT TANSO-FTS and CAI>
GOSAT restarted its observations late December 2018, which had been suspended since November 25, 2018 (TANSO-FTS target observations have been restarted on December 31, 2018). Accordingly, we will resume the product distribution from time to time.

Data missing period (UT):
  TANSO-FTS : 2018/11/24 17:26:46 - 2018/12/28 02:52:01
  TANSO-CAI : 2018/11/24 16:50:37 - 2018/12/21 06:12:10
  CAM-H8    : 2018/11/24 16:51:21 - 2018/12/28 01:50:07

  * CAM-H8 : FTS field-of-view camera

JAXA releases more information on the website:
https://www.eorc.jaxa.jp/GOSAT/currentStatus_1.html#ss1-1-5

We are sorry to cancel all observations including target observations for this period.
Thank you for your understanding for this issue.
2018/12/27 <Notification of User Registration Delay>
We would like to notify you of GDAS user registration function maintenance.
During the following period, GDAS user registration is delayed.
Though users can apply your user registration, it is completed after the maintenance.

The period of network maintenance:
  04:00 - 05:00 Thu. Dec. 27, 2018 (UT)

Thank you for your cooperation and understanding.
2018/12/26 <On Release of V02.80 FTS SWIR Level 2 Products>
V02.80 FTS SWIR L2 products ,which were processed using upgraded V210.210 FTS L1 products and V02.00 CAI L2 product, have been released to General Users as V02.80.
For the details, please refer to the documents of "Release Note" etc on "Documents & Technical Information" page.

2018/12/20 <Closing at Year Ends and New Year>
We are closing for the New Year holiday between 29 Dec. 2018 and 3 Jan. 2019 (JST). We will unable to respond to your inquiries and/or accept authorized user registrations from 6:00 (UT) on 28 Dec. 2018 until 00:00 (UT) on 4 Jan. 2019.
Even while we are closing, following functions are still available for you:
access to information, product downloads and general user registrations by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2018/12/20 <Announcement of the Observation request for RA researchers (for Mar., 2019)>
We will start accepting the observation request (from Mar. 4 to Mar. 31, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Mar. 4 (Mon), 2019 through Mar. 31 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 Dec. 26 (Wed), 2018 through 14:59 Jan. 17 (Wed), 2019 (UT).
2018/12/12 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of the external communication equipment maintenance.
During the following period, the services provided through GDAS will not be available.
The period of network maintenance:
19:00 - 20:00 Sun. Dec. 16, 2018 (UT)

Thank you for your cooperation and understanding.
2018/12/04 <To RA users>
FTS SWIR L2 products ,which were processed using upgraded V210.210 FTS L1 products and V02.00 CAI L2 products, have been released to RA Users as V02.80. The products after 2014 will be released one by one as soon as reprocessing procedure completes.
For the details, please refer to the documents of "Release Note" etc on "Documents & Information" page after logging into GDAS.
2018/11/30 <Announcement of the Observation request for RA researchers (for Feb., 2019)>
We will start accepting the observation request (from Feb. 4 to Mar. 3, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Feb. 4 (Mon), 2019 through Mar. 3 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 Nov. 29 (Wed), 2018 through 14:59 Dec. 19 (Wed), 2018 (UT).
2018/11/26 <GOSAT (IBUKI) Temporary Observation Suspension>
Greenhouse gases Observing SATellite (GOSAT) launched on January 23, 2009 shifted its operation mode to the low load mode (LLM) at around 4:20 am, November 25, 2018 (JST) and has suspended its observation. Currently, JAXA is investigating the cause of this event while taking necessary measures. As soon as more information becomes available, JAXA will release it on the website.

Note : Low load mode: the mode to save power consumption to maintain the minimum function of the satellite in case of unforeseen events.

[JAXA website]
http://www.satnavi.jaxa.jp/project/gosat/news/2018/181126.html (in Japanese)
2018/11/19 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 Thu. Nov. 29, 2018 - 08:00 Fri. Nov. 30, 2018 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/11/19 <Release of ATBD for L4 CH4 Products>
Algorithm Theoretical Basis Document (ATBD) for L4 CH4 Products was released on 19 November, 2018. Please see it on "Documents & Technical Information" page.
2018/11/06 <On Release of V01.04 L4 CH4 products>
"L4A global CH4 flux" and "L4B global CH4 distribution" products have been released to General Users as version 01.04. They are based on version 02.21- 02.60 FTS SWIR L2 XCH4 data and the WDCGG ground-based observational data etc, and cover 76 months between June 2009 and September 2015.
For the detail, please see "Important Notes at Releasing V01.04 for GU" in "L4A global CH4 flux / L4B global CH4 distribution" table on "Documents & Information" page.
2018/11/06 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the system maintenance and the legal inspection of the electric installation.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
23:30 Tue. Nov. 13 - 03:00 Thu. Nov. 15, 2018 (UT)
06:00 Fri. Nov. 16 - 04:00 Mon. Nov. 19, 2018 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/10/19 <Announcement of the Observation request for RA researchers (for Jan., 2019)>
We will start accepting the observation request (from Jan. 7 to Feb. 3, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Jan. 7 (Mon), 2019 through Feb. 3 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 Oct. 31 (Wed), 2018 through 14:59 Nov. 21 (Wed), 2018 (UT).
2018/10/17 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the legal inspection of the electric installation.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  04:00 Fri. Nov. 2 - 04:00 Mon. Nov. 5, 2018 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/10/09 <Update on the GOSAT Data Policy>
"GOSAT Data Policy" was updated to "GOSAT/GOSAT-2 Data Policy" due to the issue of the first Research Announcement on Greenhouse Gases Observing SATellite Series.
Please be sure to read GOSAT/GOSAT-2 data policy (Satellite Observation Center site) carefully before utilizing GOSAT data products.
2018/09/28 <On Release of Bias-corrected FTS SWIR Level 2 Product (V02.75)>
Using the ground-based observation data of the Total Carbon Column Observation Network (TCCON) (2009-2016), bias-corrections were conducted on the column amounts of carbon dioxide (XCO2) of the SWIR L2 product during the period from April 23, 2009 to August 31, 2018, and the results is released as the bias-corrected FTS SWIR Level 2 product.
To download the product, open "Download" > "L2 CO2 column amount (SWIR)" page and select "V02.xx (Bias corrected)" after logging into GDAS, please. For the details of this product, please refer to "Release Note of Bias-corrected FTS SWIR Level 2 CO2 Product (V02.75) for General Users".
2018/09/25 <Announcement of the Observation request for RA researchers (for Dec., 2018)>
We will start accepting the observation request (from Dec. 3, 2018 to Jan. 6, 2019) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Dec. 3 (Mon), 2018 through Jan. 6 (Sun), 2019 (UT)
  *Period to accept observation requests : 15:00 Sep. 26 (Wed), 2018 through 14:59 Oct. 17 (Wed), 2018 (UT).
2018/09/07 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 Thu. Sep. 27 - 08:00 Fri. Sep. 28, 2018 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/08/27 <Implementation result of TANSO-FTS and CAI observation suspension along with GOSAT in-plane and out-of-plane control maneuver and GOSAT lunar eclipse operation>
The GOSAT control maneuvers have completed on August 17, 2018,and the sun-glint and target observations restarted on August 21, 2018.
For more detailed schedules, please refer to the appendix.

Thank you for your cooperation.
2018/08/21 <Announcement of the Observation request for RA researchers (for Nov., 2018)>
We will start accepting the observation request (from Nov. 5 to Dec. 2, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Nov. 5 (Mon), 2018 through Dec. 2 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 Aug. 29 (Wed), 2018 through 14:59 Sep. 19 (Wed), 2018 (UT).
2018/08/07 <The schedule extension of GOSAT inclination control maneuver>
The schedule of the GOSAT inclination control maneuvers was extended.

 * The original schedule: July 15 - August 17, 2018.
 * The updated schedule : July 15 - August 21, 2018.

The sun-glint and target observations will be restarted from August 25, 2018.
For more detailed schedules, please refer to the appendix.

Thank you for your understanding.
2018/07/23 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of upcoming outage of GDAS for Power Saving and the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:00 Fri. Aug. 10 - 04:00 Mon. Aug. 20, 2018 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/07/19 <Announcement of the Observation request for RA researchers (for Oct., 2018)>
We will start accepting the observation request (from Oct. 1 to Nov. 4, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Oct. 1 (Mon), 2018 through Nov. 4 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 July 25 (Wed), 2018 through 14:59 Aug. 15 (Wed), 2018 (UT).
2018/07/17 <To RA users>
"L4A global CH4 flux" and "L4B global CH4 distribution" products were released to RA users as version 01.04 on 13 July, 2018. ATBD was also published for RA users today, so please see it on "Documents & Information" page after logging into GDAS.
2018/07/13 <To RA users>
"L4A global CH4 flux" and "L4B global CH4 distribution" products have been released to RA users as version 01.04. They are based on version 02.21- 02.60 FTS SWIR L2 XCH4 data and the WDCGG ground-based observational data etc, and cover 76 months between June 2009 and September 2015.
For the detail, please see "Important Notes at Releasing V01.04 for RA" in "L4A global CH4 flux / L4B global CH4 distribution" table on "Documents & Information" page after logging into GDAS. ATBD will be also released to RA users soon. After that, we will inform you of it again.
2018/07/02 <Temporal observation suspension of GOSAT TANSO-FTS and CAI: the GOSAT maneuver operation performed>
We would like to inform you that the GOSAT maneuver operation has performed on July 27, 2018.
Accordingly, GOSAT TANSO-FTS and CAI observation has been suspended during the following periods:

TANSO-FTS : 2018/06/27 12:15:48 (UT) - 2018/06/27 20:17:17 (UT)
TANSO-CAI : 2018/06/27 11:45:20 (UT) - 2018/06/27 20:44:50 (UT)

All GOSAT observations have been canceled during these periods.
We are sorry for any inconvenience this may cause you.

Thank you for your understanding for this issue.
2018/06/29 <Temporal observation suspension of TANSO-FTS and CAI for GOSAT inclination control maneuver and lunar eclipse operation>
GOSAT TANSO-FTS and CAI observation will be suspended during GOSAT inclination control maneuvers* scheduled for the period between July 15 and August 17, 2018, and during the lunar eclipse operations scheduled for July 13 and August 11, 2018. The detailed TANSO-FTS and CAI observation suspension (standby) periods are listed in the appendix.

Please note that sun-glint and target observations will be canceled during the entire control period, while standard mesh observations will be canceled only during the TANSO-FTS observation suspension (standby) periods.
The restart schedule of sun-glint and target observations will change depending on whether any maneuvers are performed on August 17 (reserved). For more detailed schedules, please refer to the appendix.

Thank you for your understanding.

*Inclination control maneuver: a maneuver to maintain the orbit of a satellite within the predetermined range
2018/06/27 <Important notice for the temporally observation stop of TANSO-FTS and CAI for the GOSAT maneuver operation>
We would like to inform you that the GOSAT maneuver operation is scheduled for the following periods:

TANSO-FTS : 2018/06/27 12:15:51 (UT) - 2018/06/27 20:16:46 (UT)
TANSO-CAI : 2018/06/27 12:05:51 (UT) - 2018/06/27 20:26:46 (UT)

All GOSAT observations will be suspended during the periods. We are sorry for any inconvenience this may cause you. GOSAT observation will re-start as soon as the maneuver is completed.
Please note that NO orbit drift as well as NO shift from the grid observation points are expected after this maneuver.

Thank you for your understanding for this issue.
2018/06/25 <Announcement of the Observation request for RA researchers (for Sep., 2018)>
We will start accepting the observation request (from Sep. 3 to Sep. 30, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Sep. 3 (Mon), 2018 through Sep. 30 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 June 27 (Wed), 2018 through 14:59 July 18 (Wed), 2018 (UT).

2018/06/13 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:00 - 08:00 Wed. June 20, 2018 (UT)
Special Note:
*Users will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/06/06 <On GOSAT Score Map site (JAXA) for RA users>
GOSAT Score Map for Sampling Optimization site (JAXA) was published.
It provides the score information of satellite observation sampling pattern for global and regional flux estimation.
Please see "Submission of Observation Requests" on "Documents & Information" page after login.
2018/05/30
Important notice for the data distribution restart of TANSO-FTS and CAI,

The Greenhouse gases observing satellite "IBUKI" (GOSAT) restarted observing and communication with the ground stations and the data distribution was also restarted.

Data missing period;
TANSO-FTS : 17/05/2018 18:48:25 (UT) -24/05/2018 22:38:37(UT)
TANSO-CAI : 17/05/2018 17:12:54 (UT) -24/05/2018 21:50:20(UT)
CAM-H8(FTS field-of-view camera) : 17/05/2018 18:48:29 (UT) -24/05/2018 22:38:41(UT)

We are sorry to cancel all observations for this period and target observations.
Thank you for your understanding for this issue.
2018/05/25 <Announcement of the Observation request for RA researchers (for Aug., 2018)>
We will start accepting the observation request (from Aug. 6 to Sep. 2, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Aug. 6 (Mon), 2018 through Sep. 2 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 May 30 (Wed), 2018 through 14:59 June 20 (Wed), 2018 (UT).
2018/05/22
Important notice for the temporally observation data distribution stop of TANSO-FTS and CAI,
The Greenhouse gases observing satellite "IBUKI" (GOSAT) restarted observing and communication with the ground stations and the data distribution was also restarted.

Data available;
TANSO-FTS : till 17/05/2018 18:00:15 (UT)
TANSO-CAI : till 17/05/2018 17:12:54 (UT)

We are sorry to cancel all observations for this period and target observations.
We are investigating the cause of this issue, we will notify you again when we know those results.
2018/05/21 <Reprocessing of V210.210 FTS L1B products for the past periods completed>
We completed reprocessing of the V210.210 FTS L1B products observed in the past (from 2009/4/23 to 2018/3/28) and started the distribution. Currently, V210.2110 FTS L1B products for the entire observation period are downloadable from GDAS.
Accordingly, the distribution of V205.205 products, which has been released to RA users for evaluation, are going to finish at the end of this June.
2018/05/14 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 Thu. May 24, 2018 - 08:00 Fri. May 25, 2018 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/05/10 <Release of GOSAT Tools>
The GOSAT Tools were released. By specifying the search conditions (observation period, path, and area), they can copy downloaded CAI product and export datasets from downloaded FTS product. Available types of product are CAI L1B/L1B+, L2 and FTS L2. Please see "GOSAT Tools" page at "Tools" of Submenu and apply to us if users need them.
2018/04/25 <Notes on the release of the bias-corrected FTS SWIR Level 3 products (V02.x5, V02.x6)>
The bias-corrected FTS SWIR Level 3 products of V02.x5 and V02.x6, which are produced from bias-corrected FTS SWIR Level 2 products of V02.x5 and V02.x6 were released on April 25, 2018. All users are recommended to read this release note on "Documents & Technical Information" page and understand their characteristics.
2018/04/23 <Closing for the national holidays>
We are closing for the national holidays from 28 Apr. to 30 Apr. and from 3 May to 6 May, 2018 (JST). We will unable to respond to your inquiries and/or accept Authorized User registrations from 15:00 (JST) of the day before the holidays until our start time of the work.
Even while we are closing, following functions are still available for you:
access to information, product downloads, and observation requests by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2018/04/23 <Announcement of the Observation request for RA researchers (for July, 2018)>
We will start accepting the observation request (from Jul. 2 to Aug. 5, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Jul. 2 (Mon), 2018 through Aug. 5 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 Apl. 25 (Wed), 2018 through 14:59 May 16 (Wed), 2018 (UT).
2018/04/18 <Release of FTS PPDF-S (SWIR) data to RA users>
FTS PPDF-S (SWIR) CO2/CH4 column amounts data started to be released to RA users today. The PPDF-S data store the dry-volume mixing ratios of carbon dioxide (CO2) and methane (CH4) retrieved by the PPDF-S method from the short-wavelength infrared spectrum (SWIR). These data are provided in HDF5 format.
For the details, please refer to "Algorithm Theoretical Basis Document (ATBD)" for physical theories and the mathematical background, and "Data Format Description". The versions to be provided are V02.21(2009/6/3-2014/5/24), V02.31(2014/6/16-2014/12/14) and V02.40 (2015/2/1-2015/8/2).
2018/04/16 <Announcement on GOSAT Data Aechive System recovery>
The system fault on GDAS has been recovered.
Users became to be able to use "User Registration", "E-mail address (user ID) change"and "Password change" functions.
We apologize for any inconvenience this may have caused.
2018/04/16 <Announcement on GOSAT Data Aechive System fault>
Thank you for using GOSAT Data Archive Service.
A system fault of GDAS occured on 15 April, 2018. Users cannot use "User Registration", "E-mail address (user ID) change"and "Password change" functions now due to this issue.
We would like to ask users not to use these functions until the recovery.
We apologize for any inconvenience this may have caused.
2018/04/11 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:00 - 05:00 Wed. Apr. 18, 2018 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/04/06 <Maintenance Schedule in FY2018>
Maintenance Schedule in FY2018 was updated. For the detail, please refer to "Maintenance Schedule" under "News & Topics".
2018/04/04 <Release of V210.210 FTS L1B product>
V210.210 FTS L1B product observed after 00:26 March 28, 2018 (UT) has started to be released to users today. All observational data before 00:25 March 28, 2018 (UT) is being reprocessed and will be released successively. For the details of the upgrade to V210.210 FTS L1B product, please refer to the release note.
2018/03/28 <Version upgrade of the FTS L1B product>
  FTS L1B product was upgraded from V201.202 to V210.210 on March 28, 2018. The distribution will be started from April 4, 2018. All observational data before March 27, 2018 is being reprocessed and will be released successively. V201.202 FTS L1B product continues to be distributed until FTS SWIR L2 upgrade is completed (expected in late FY2018).
  Some important corrections have been made to the V210.210 product including modification of Band4 TIR non-linearly correction; extension of sun-glint latitudinal range and glint flag updates; update of SWIR radiance conversion table; change of Band1 high gain saturation criteria. For the details, please refer to the release note.
  V205.205 product, which has been released to RA users for evaluation, also continues to be distributed until finishing the V210.210 reprocessing (expected in the end of June 2018).
2018/03/26 <Announcement of the Observation request for RA researchers (for June, 2018)>
We will start accepting the observation request (from Jun. 4 to Jul. 1, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Jun. 4 (Mon), 2018 through Jul. 1 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 Mar. 28 (Wed), 2018 through 14:59 Apr. 18 (Wed), 2018 (UT).
2018/03/16 <Distribution resumed: Bias-corrected FTS SWIR Level 2 CO2 Product (V02.x6)>
We would like to inform you that the distribution of Bias-corrected FTS SWIR Level 2 CO2 Products has been resumed, which had been suspended since March 9, 2018.

Versions of bug-corrected products: V02.26 (2009/4/23-2014/5/24)
                                    V02.36 (2014/6/16-2014/12/14)
                                    V02.46 (2015/2/1-2015/8/2)
* There is no revision for the Bias-corrected FTS SWIR Level 2 CH4 Products.

Please also refer to the revised Release Note and Product Format Descriptions:
https://data2.gosat.nies.go.jp/doc/document.html#Document

We apologize for any inconvenience we may have caused with this issue, and thank you for your understanding. Please download the products again.
2018/03/12 <Regarding the bug found in Bias-corrected FTS SWIR Level 2 CO2 Products (V02.x5) >
We would like to inform you that a bug was found in Bias-corrected FTS SWIR Level 2 CO2 Products released on October 27, 2017. Accordingly, the distribution of those products has been suspended since March 9, 2018.
Product Name: Bias-corrected FTS SWIR Level 2 CO2 Products
Affected Versions : V02.25 (2009/4/23-2014/5/24)
                    V02.35 (2014/6/16-2014/12/14)
                    V02.45 (2015/2/1-2015/8/2)

The detail of the bug:
"Bias corrected CO2 dry air mixing ratio",
"Bias corrected error in CO2 dry air mixing ratio" and "Surface albedo O2A used for bias correction" for the land area observation are not correct.

Distribution of bug-corrected products :
Bug-corrected products will be available from GDAS after 16 March 2018. The version numbers will also be updated as shown below.

          V02.26 (2009/4/23-2014/5/24)
          V02.36 (2014/6/16-2014/12/14)
          V02.46 (2015/2/1-2015/8/2)
*We confirmed that there is no problem with the bias-corrected FTS SWIR Level 2 CH4 Products.

We apologize for any inconvenience we may have caused with this issue, and thank you for your understanding.
We will inform you as soon as the corrected products become available.
2018/03/09 <Temporal Stop: Bias-corrected FTS SWIR Level 2 CO2 Product (V02.x5) distribution>
We would like to inform you that the distribution of Bias-corrected FTS SWIR Level 2 CO2 Products has been suspended because of a system bug.
The details will be announced later.
We apologize for any inconvenience we may have caused with this issue, and thank you for your understanding.
Versions of Bias-corrected Product :
V02.25(2009/4/23-2014/5/24)
V02.35(2014/6/16-2014/12/14)
V02.45(2015/2/1-2015/8/2)
2018/03/05 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 Thu. Mar. 22, 2018 - 04:00 Fri. Mar. 23, 2018 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/03/02 <Apology for GDAS outage>
Thank you for using GOSAT Data Archive Service.
GDAS had stopped during the period around 5:40 to 8:00 on 28 Feb. 2018 (UT) because of an unexpected system error.
The system has already been recovered, however, if you have any trouble in relation to this outage, please contact GOSAT support.
We apologize for any inconvenience this may have caused.
2018/02/23 <Announcement of the Observation request for RA researchers (for May, 2018)>
We will start accepting the observation request (from May 7 to Jun. 3, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : May 7 (Mon), 2018 through Jun. 3 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 Feb. 28 (Wed), 2018 through 14:59 Mar. 21 (Wed), 2018 (UT).
2018/02/13 <Notes on the release of the FTS SWIR Level 3 products (V02.72)>
The FTS SWIR Level 3 products of V02.72, which are produced from FTS SWIR Level 2 products of V02.72 for the period of June 2009 to December 2017, were released on February 13, 2018. All users are recommended to read this release note on "Documents & Technical Information" page and understand their characteristics.
2018/02/09 <Announcement of the Observation request for RA researchers (for Apr., 2018)>
We will start accepting the observation request (from Apr. 2 to May 6, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Apr. 2 (Mon), 2018 through May 6 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 Jan. 24 (Wed), 2018 through 14:59 Feb. 14 (Wed), 2018 (UT).
2018/01/30 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the urgent system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:00 - 08:00 Thu. Feb. 1, 2018 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/01/12 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 Thu. Jan. 25, 2018 - 08:00 Fri. Jan. 26, 2018 (UT)
Special Note:
You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2018/01/10 <Important notice for the temporally observation stop of TANSO-FTS and CAI because of the GOSAT maneuver operation (on January 4, 2018)>
For more detailed schedule, please see the below:

TANSO-FTS : 2018/01/04 10:31:49 (UT) - 2018/01/05 02:43:39 (UT)
TANSO-CAI : 2018/01/04 10:21:49 (UT) - 2018/01/05 02:53:39 (UT)

We are sorry to cancel all observations for this period and target observations until 2018/01/06 01:48:16. The GOSAT orbit will be drifted. The shift of the grid observation points will be maximized around March 12, 2018 and returned back to the original points around May 2, 2018. Thank you for your understanding for this issue.
2017/12/27 <Release of Ver. 205 Radiometric Conversion for RA user's evaluation>
We started distributing Ver. 205.205 FTS L1B products to RA investigators on December 21, 2017. Ver.205 Radiometric Conversion was released to RA users at "Technical Information" on "Documents & Information" page after login to GDAS.
Any feedbacks from you would be welcomed and appreciated. If you have any comments or suggestions on these products, please inform us at by January 21, 2018.
2017/12/27 <Announcement of the Observation request for RA researchers (for Mar., 2018)>
We will start accepting the observation request (from Mar. 5 to Apr. 1, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Mar. 5 (Mon), 2018 through Apr. 1 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 Dec. 27 (Wed), 2017 through 14:59 Jan. 17 (Wed), 2018 (UT).
2017/12/21 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the urgent system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:00 - 08:00 Tue. Dec. 26, 2017 (UT)
Special Note:
You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2017/12/21 <Release of Ver. 205.205 FTS L1B product for RA users>
  We are now preparing for upgrading the GOSAT FTS L1 products. For evaluation purposes, we started distributing Ver. 205.205 FTS L1B products to RA investigators prior to the release to general users (GU) on December 21, 2017. Currently, the products of the period from April 23, 2009 through December 31, 2012 are ready to release. We will distribute further products of the subsequent periods as they are ready. In obtaining data products, please select the FTS L1B data (V205.205) from the "Download" page of GDAS. As the products of Ver. 205.205 are released temporarily for evaluation, the version number will be changed to Ver. 210.210 at the official release to GU.
  For further details of this version upgrade, please refer to release notes and products description documents available from the "Documents & Information" page of GDAS.
  Any feedbacks from you would be welcomed and appreciated. If you have any comments or suggestions on these products, please inform us at by January 21, 2018.
2017/12/20 <Important notice for the temporally observation stop of TANSO-FTS and CAI because of the solar eclipse by the Moon (on February 15, 2018)>
It is scheduled on February 15, 2018. For details, please see the below:

TANSO-FTS : 2018/02/15 18:44:07 (UT) - 2018/02/16 06:01:24 (UT)
TANSO-CAI : 2018/02/15 18:34:07 (UT) - 2018/02/16 06:11:24 (UT)

We are sorry to cancel all observations for this period. Thank you for your understanding for this issue.
2017/12/19 <Closing at Year Ends and New Year>
We are closing for the New Year holiday between 29 Dec. 2017 and 3 Jan. 2018 (JST). We will unable to respond to your inquiries and/or accept authorized user registrations from 6:00 (UT) on 28 Dec. 2017 until 00:00 (UT) on 4 Jan. 2018.
Even while we are closing, following functions are still available for you:
access to information, product downloads and general user registrations by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2017/12/11 <On Release of V02.72 FTS SWIR Level 2 Products>
V02.72 FTS SWIR L2 products ,which were processed using upgraded V201.202 FTS L1 products and V02.00 CAI L1/L2 products, have been released to General Users as V02.72.
For the details, please refer to the documents of "Release Note" etc on "Documents & Technical Information" page.
In addition, please refer to updated "FTS SWIR L2 Gallery".
2017/11/28 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
03:00 Fri. Dec. 15, 2017 - 04:00 Mon. Dec. 18, 2017 (UT)
Special Note:
You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.

2017/11/17 <Announcement of the Observation request for RA researchers (for Feb., 2018)>
We will start accepting the observation request (from Feb. 5 to Mar. 4, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Feb. 5 (Mon), 2018 through Mar. 4 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 Nov. 29 (Wed), 2017 through 14:59 Dec. 20 (Wed), 2017 (UT).
2017/11/02 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the legal inspection of the electric installation and the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 Fri. Nov. 24 - 08:00 Mon. Nov. 27, 2017 (UT)
Special Note:
You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2017/10/27 <Announcement of the Observation request for RA researchers (for Jan., 2018)>
We will start accepting the observation request (from Jan. 1 to Feb. 4, 2018) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Jan. 1 (Mon), 2018 through Feb. 4 (Sun), 2018 (UT)
  *Period to accept observation requests : 15:00 Oct. 25 (Wed), 2017 through 14:59 Nov. 15 (Wed), 2017 (UT).
2017/10/27 <On Release of Bias-corrected FTS SWIR Level 2 Product (V02.x5)>
 Using the ground-based observation data of the Total Carbon Column Observation Network (TCCON), bias-corrections were conducted on the column amounts of carbon dioxide and methane (XCO2 and XCH4) of the SWIR L2 product during the period from April 23, 2009 to August 2, 2015, and the results are released as the bias-corrected FTS SWIR Level 2 products on October 26, 2017.
 To download the products, open "Download" > "L2 CO2/CH4 column amount (SWIR)" page and select "V02.x5 (Bias corrected)" after logging into GSAS, please. For the details of this product, please refer to "Release Note of Bias-corrected FTS SWIR Level 2 Products (V02.x5)".
2017/10/23 <Important notice for data missing of CAM-H8>
The CAM-H8 (FTS field-of-view camera) image data was missing on October 17, 2017. For details, please see the below:

CAM-H8 data missing period :
2017/10/17 06:09:22 (UT) - 2017/10/17 06:09:30 (UT)
2017/10/17 06:09:38 (UT) - 2017/10/17 06:12:38 (UT)

TANSO-FTS L1B products are provided without including the CAM-H8 image data at the above period.
2017/10/20 <Announcement of GOSAT Data Archive Service maintenance>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
03:00 - 04:00 Tue. Oct. 24, 2017 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2017/10/03 <Announcement of GDAS System Service Outage>
We would like to notify you of upcoming outage of GDAS for the legal inspection of the electric installation and the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 Fri. Oct. 13 - 04:00 Mon. Oct. 16, 2017 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2017/09/25 <Announcement of the Observation request for RA researchers (for Dec., 2017)>
We will start accepting the observation request (from Dec. 4 to Dec. 31, 2017) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Dec. 4 (Mon), 2017 through Dec. 31 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 Sep. 27 (Wed), 2017 through 14:59 Oct. 18 (Wed), 2017 (UT)
2017/09/08 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of upcoming outage of GDAS for the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
04:00 Thu. Sep. 28 - 08:00 Fri. Sep. 29, 2017 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2017/09/01 <"Gallery" pages have been updated.>
We would like to inform you that we have updated the "Gallery" pages as below.
1) "FTS SWIR L2", "FTS SWIR L3" and "CAI L3 NDVI Map" can be scrolled year by year.
2) "L4B Global Gas Concentration Animations" were changed to MPEG-4 form.
2017/08/31 <Announcement of the Observation request for RA researchers (for Nov., 2017)>
We will start accepting the observation request (from Nov. 6 to Dec. 3, 2017) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Nov. 6 (Mon), 2017 through Dec. 3 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 Aug. 30 (Wed), 2017 through 14:59 Sep. 20 (Wed), 2017 (UT).
2017/08/29 <Announcement of GOSAT Data Archive Service "Gallery" maintenance>
We would like to notify you of "Gallery" maintenance.
During the following period, "Gallery" page will not be available.
The period of network maintenance:
  03:00 - 04:00 Thu. Aug. 31, 2017 (UT)

Thank you for your cooperation and understanding.
2017/08/03 <On "Tool for generating CAM images in FTS L1B">
"Tool for generating CAM images in FTS L1B"(for V201.202) is available for download from JAXA website. Please click "TOOLS" on this page and refer to "GOSAT FTS Level 1B Product Support Tool".
2017/08/01 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of the external communication equipment maintenance.
During the following period, the services provided through GDAS will not be available.
The period of network maintenance:
19:00 - 20:00 Fri. Aug. 4, 2017 (UT)

Thank you for your cooperation and understanding.
2017/07/26 <Important notice for the temporally observation stop of TANSO-FTS and CAI because of the solar eclipse by the Moon (on August 21, 2017)>
It is scheduled on August 21, 2017. For details, please see the below:

TANSO-FTS : 2017/08/21 16:27:52 (UT) - 2017/08/22 05:23:20 (UT)
TANSO-CAI : 2017/08/21 16:17:52 (UT) - 2017/08/22 05:33:20 (UT)

We are sorry to cancel all observations for this period. Thank you for your understanding for this issue.
2017/07/25 <Announcement of the Observation request for RA researchers (for Oct., 2017)>
We will start accepting the observation request (from Oct. 2 to Nov. 5, 2017) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Oct. 2 (Mon), 2017 through Nov. 5 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 Jul. 26 (Wed), 2017 through 14:59 Aug. 16 (Wed), 2017 (UT).
2017/07/07 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of upcoming outage of GDAS for Power Saving and the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Thu. Aug. 10 - 04:00 Mon. Aug. 21, 2017 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2017/06/26 <Announcement of the Observation request for RA researchers (for Sep., 2017)>
We will start accepting the observation request (from Sep. 4 to Oct. 1, 2017) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Spe. 4 (Mon), 2017 through Oct. 1 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 Jun. 28 (Wed), 2017 through 14:59 Jul. 19 (Wed), 2017 (UT).
2017/06/22 <On Release of V02.05 L4 CO2 products>
"L4A global CO2 flux" and "L4B global CO2 distribution" products have been released to General users as version 02.05. They are based on version 02.21- 02.60 of FTS SWIR L2 XCO2 data and the GLOBALVIEW surface-based CO2 data and cover 53 months between June 2009 and October 2015.
For the detail, please see "L4A global CO2 flux / L4B global CO2 distribution" > "Important Notes at Releasing V02.05 for GU" on "Documents & Information" page.
Further, we have stopped distributing the old version 02.03 L4 CO2 products.
2017/06/16 <Release of Ver.2.0 ATBD for Ver.02.xx FTS SWIR L2 products>
We are pleased to inform you that the "ATBD (Algorithm Theoretical Basis Document)" for the FTS SWIR L2 for Ver. 02.21 - 02.60 is available from 16 Jun. 2017.
You can get it from "Documents (Product Descriptions)" >"FTS L2 column amount (SWIR)" menu on "Documents & Information" page.
2017/05/22 <Important notice for the observation of TANSO-FTS>
We lost the TANSO-FTS transition command to the night observation mode, the day observation mode continued at night side for about 45 minutes.
Please see the link here for the list of FTS L1 products affected by this incident.

The corresponding period: 2017/05/09 23:02 - 23:45 (UT)

During the above mentioned period, different from a normal operation, observation at night side was made in OB1D (OBservation mode 1 Day side) mode instead of OB1N (OBservation mode 1 Night side) mode. Please note that this did NOT affect the data quality.
2017/05/22 <To RA users>
"L4A global CO2 flux" and "L4B global CO2 distribution" products have been released to RA users as version 02.05. They are based on version 02.21- 02.60 of FTS SWIR L2 XCO2 data and the GLOBALVIEW surface-based CO2 data and cover 53 months between June 2009 and October 2015.
For the detail, please see "L4A global CO2 flux / L4B global CO2 distribution" > "Important Notes at Releasing V02.05 for RA" on "Documents & Information" page.
2017/05/18 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
00:00 - 08:00 Fri. May 26, 2017 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2017/05/18 <Announcement of the Observation request for RA researchers (for Aug., 2017)>
We will start accepting the observation request (from Aug. 7 to Sep. 3, 2017) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Aug. 7 (Mon), 2017 through Sep. 3 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 May 31 (Wed), 2017 through 14:59 June 21 (Wed), 2017 (UT).
2017/04/24 <Closing for the national holidays>
We are closing for the national holidays from 3 May to 7 May, 2017. We will unable to respond to your inquiries and/or accept Authorized User registrations from 15:00 (JST) of the day before the holidays until our start time of the work.
Even while we are closing, following functions are still available for you:
access to information, product downloads, and observation requests by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2017/04/24 <Announcement of the Observation request for RA researchers (for July, 2017)>
We will start accepting the observation request (from July 3 to Aug. 6, 2017) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : July 3 (Mon), 2017 through Aug. 6 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 Apr. 26 (Wed), 2017 through 14:59 May 17 (Wed), 2017 (UT).
2017/04/03 <Maintenance Schedule in FY2017>
Maintenance Schedule in FY2017 was updated. For the detail, please refer to "Maintenance Schedule" under "News & Topics".
2017/03/28 <On Release of Ver. 02.00 CAI L3 global radiance distribution Product>
We would like to inform you that New Version V02.00 CAI L3 global radiance distribution Product was released to General Users. Please read the release note on "Document & Information" page.
Since the product will not be reprocessed, please use V01.00 data observed from 2009 to 2016.
2017/03/27 <Announcement of the Observation request for RA researchers (for June, 2017)>
We will start accepting the observation request (from June 5 to July 2, 2017) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : June 5 (Mon), 2017 through July 2 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 Mar. 29 (Wed), 2017 through 14:59 Apr. 19 (Wed), 2017 (UT).
2017/03/10 <Important notice for the temporally stop of CAM-H8>
The CAM-H8 (FTS field-of-view camera) was not controlled on March 1, 2017. The CAM-H8 operation was resumed normally on March 4 after the reset operation. For details, please see the below:

CAM-H8 stopped period : 2017/03/01 15:45 (UT) - 2017/03/04 05:49 (UT)

TANSO-FTS L1B products are provided without including the CAM-H8 image data at the stopped period.
2017/03/03 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Fri. Mar. 24 - 08:00 Mon. Mar. 27, 2017 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2017/02/20 <Announcement of the Observation request for RA researchers (for May, 2017)>
We will start accepting the observation request (from May 1 to Jun. 4, 2017) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : May 1 (Mon), 2017 through Jun. 4 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 Feb. 22 (Wed), 2017 through 14:59 Mar. 15 (Wed), 2017 (UT).
2017/02/10 <Important notice for the temporally observation stop of TANSO-FTS and CAI because of the solar eclipse by the Moon (on February 26, 2017)>
It is scheduled on February 26, 2017. For details, please see the below:

TANSO-FTS : 2017/02/26 12:02:02 (UT) - 2017/02/27 00:57:30 (UT)
TANSO-CAI : 2017/02/26 11:52:02 (UT) - 2017/02/27 01:07:30 (UT)

We are sorry to cancel all observations for this period. Thank you for your understanding for this issue.
2017/01/23 <Announcement of the Observation request for RA researchers (for Apr., 2017)>
We will start accepting the observation request (from Apr. 3 to Apr. 30, 2017) of GOSAT/FTS from the PIs.
For Submission method of Observation Requests, please see "Submission of Observation Requests" on "Documents & Information" page after logging into GDAS.
  *Period for the observation : Apr. 3 (Mon), 2017 through Apr. 30 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 Jan. 25 (Wed), 2017 through 14:59 Feb. 15 (Wed), 2017 (UT).
2017/01/19 <Announcement on Publish of a newsletter on the satellite 'IBUKI' NIES GOSAT PROJECT NEWSLETTER>
A newsletter on the satellite 'IBUKI' NIES GOSAT PROJECT NEWSLETTER ISSUE #32 (WINTER 2016) has been published.
2017/01/12 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 Mon. Jan. 30 - 08:00 Tue. Jan. 31, 2017 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.
2016/12/27 <Closing at Year Ends and New Year>
We are closing for the New Year holiday between 29 Dec. 2016 and 3 Jan. 2017 (JST). We will unable to respond to your inquiries and/or accept authorized user registrations from 6:00 (UT) on 28 Dec. 2016 until 00:00 (UT) on 4 Jan. 2017.
Even while we are closing, following functions are still available for you:
access to information, product downloads and general user registrations by the registered users.
We apologize for any inconvenience that might be causing you during this period.
2016/12/27 <On Release of Ver. 02.00 CAI L1B+ and L3 global reflectance distribution Products>
We would like to inform you that New Version V02.00 CAI L1B+ and global reflectance distribution Products were released to General Users. Please read the release note on “Document & Information” page.
The remaining past data of CAI L3 global reflectance distribution product is being reprocessed now. It will be released after reprocessing. For the information of the observational period reprocessed, please refer to “Relationship between obs. period and version”.
CAI L1B+ product will not be reprocessed and the data observed data after Dec. 1 2016 as V02.00 are available.
2016/12/22 <Announcement of the Observation request for RA researchers (for Mar., 2017)>
We will start accepting the observation request (from Mar. 6 to Apr. 2, 2017) of GOSAT/FTS from the PIs.
Submission method of Observation Requests was changed after this time because of GUIG stop.
For the detail, please see this document.
  *Period for the observation : Mar. 6 (Mon), 2017 through Apr. 2 (Sun), 2017 (UT)
  *Period to accept observation requests : 15:00 Dec. 28 (Wed), 2016 through 14:59 Jan. 18 (Wed), 2017 (UT).
2016/12/22 <Announcement of GOSAT Data Archive Service Outage>
We would like to notify you of the system maintenance.
During the following period, all the services provided through GDAS will not be available.
The period of Service Outage:
  00:00 - 08:00 Tue. Dec. 27, 2016 (UT)
Special Note:
*Please access GUIG during this period, because you will not be able to access GDAS.
Thank you for your cooperation and understanding.
2016/12/13 <On Release of V02.04 L4 CO2 products>
"L4A global CO2 flux" and "L4B global CO2 distribution" products have been released to General users as version 02.04. They are based on version 02.21 of FTS SWIR L2 XCO2 data and the GLOBALVIEW surface-based CO2 data and cover 53 months between June 2009 and October 2013. "L4 Browse Image" is also available through GDAS.
For the detail, please see "Important Notes at Releasing V02.04 for GU" on "Documents & Technical Information" page.
2016/12/13 <Announcement of Network Maintenance>
We would like to notify you of the network maintenance.
During the following period, the services provided through GDAS will not be available intermittently.
If you are not in a hurry, please use GDAS except for the maintenance period.
The period of network maintenance:
15:00 - 17:00 Fri. Dec. 23, 2016 (UT)

Thank you for your cooperation and understanding.
2016/12/01 <Announcement: GOSAT Data Archive Service (GDAS) started.>
For detailed instructions, please refer to “How to use this website” available from the submenu on this site. Please note that GUIG will stop its services on December 28, 2016 8:00 (UT).
In case of any queries, please contact GOSAT Support at ().

With the start of GDAS, we newly released the following products: V02.00 CAI L1b; L2 cloud flag; L2 cloud property; L2 aerosol property; L3 global radiance distribution; L3 NDVI.

(List of products available from GDAS)
*Product List (FTS)
FTS L1B data(Daily):V161.160、V161.161、V201.202
FTS FOV image(HDF)(Daily):no versions
FTS Estimated Geolocation data(Daily):V01.21、V01.22 (in preparation)
L2 CO2/CH4/H2O column amount (SWIR)(Monthly):V02.21、V02.31、V02.40、V02.50、V02.60
L2 CO2/CH4 profile (TIR)(Monthly):V01.20
L3 global CO2/CH4 distribution (SWIR)(Monthly):V02.21、V02.31、V02.40、V02.50、V02.60

*Product List (CAI)
CAI L1B data(Path):V02.00
CAI L1B+ data(Path):V01.00(-2016/11/30)、V02.00(2016/12/1-)
L2 Cloud Flag(Path):V02.00
L2 Cloud Property(Path):V02.00
L2 Aerosol Property(Path):V02.00
L3 global radiance distribution(Monthly):V01.00(-2016/11/30)、V02.00(2016/12/1-)
L3 global reflectance distribution(Monthly):V02.00
L3 NDVI(Monthly):V02.00

*Product List (L4)
L4A global CO2 flux(netcdf)(Annual):V02.03、V02.04
L4A global CO2 flux(text)(Annual):V02.03、V02.04
L4B global CO2 distribution(netcdf)(Annual):V02.03、V02.04
L4A global CH4 flux(netcdf)(Annual):V01.03
L4A global CH4 flux(text)(Annual):V01.03
L4B global CH4 distribution(netcdf)(Annual):V01.03