2026/05/01

<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 Tue. May 12, 2026 - 08:00 Fri. May 15, 2026 (UT)
Special Note:
*You will not be able to access GDAS during this period.
Thank you for your cooperation and understanding.

2026/04/24

<Closing for the national holidays>
We are closing for the national holidays on 29 Apr. and from 2 May to 6 May, 2026 (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.

2026/04/21

<Announcement of the Observation request for RA researchers (for Jul., 2026)>
We will start accepting the observation request (from Jul. 6, 2026 to Aug. 2, 2026) 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. 6 (Mon), 2026 through Aug. 2 (Sun), 2026 (UT)
  *Period to accept observation requests : 15:00 Apr. 29 (Wed), 2026 through 14:59 May 20 (Wed), 2026 (UT).

2026/04/16

<Release of V300.301 FTS L1B product>
FTS L1B product has been upgraded from V300.300 to V300.301. 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 April 2025 to March 2026 are reprocessed and those from 17 March 2026 are processed in real time, and provided sequentially as they are ready.
In addition, we will continue processing and distributing the old version 230.231 FTS L1B product in parallel. However, the old version 300.300 FTS L1B product will continue to be distributed, but the data processing for the new observation date after 16 March 2026 will be stopped.

2026/04/08

<Maintenance Schedule in FY2026>
Maintenance Schedule in FY2026 was updated. For the detail, please refer to "Maintenance Schedule" under "News & Topics". Additionally, system maintenance may be changed. In that case, we will notify you separately.

2026/03/06

<Announcement on Network Equipment Power Supply Malfunction>
Since around 03:15 on Fri. March 6, 2026, users had not connected to GOSAT Data Archive Service due to the power supply malfunction of the network equipment.
It has been recovered around 04:45 on the same day.
We apologize for any inconvenience this may have caused.

2026/03/03

<Announcement of GOSAT Data Archive Service System Maintenance>
We would like to notify you of GDAS system maintenance.
During the following period, GDAS will be interrupted or disconnected and unable to login for several minutes during the following period.
The period of System Maintenance:
from 06:30 to 08:00 on Mon. Mar. 9, 2026 (UT)
Thank you for your cooperation and understanding.

2026/02/17

<Resuming the observation data Distribution of GOSAT TANSO-FTS>
The GOSAT has stopped the TANSO-FTS observation data Distribution since December 18, 2025. After the TANSO-FTS restart operation, the observation data Distribution resumed from February 4, 2026. The TANSO-CAI observation also restarted as well as the TANSO-FTS restart operation.

TANSO-FTS data stop period (confirmed) :
2025/12/18 06:02:14 ～ 2026/2/4 02:45:58 (UT)
TANSO-CAI data stop period (confirmed) :
2026/1/26 23:43:19 ～ 2026/2/3 02:42:13 (UT)