<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).
<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.
<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
<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.
<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.
<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.
<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.
<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.
<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.