Greenhouse gases Observing SATellite-2 (GOSAT-2) Project
JAXA Supercomputer System Annual Report February 2024-January 2025
Report Number: R24ER3500
Subject Category: Space Technology
- Responsible Representative: SUTO, Hiroshi, GOSAT-2 Project Team, Space Technology Directorate I
- Contact Information: Rio Kajiura(kajiura.rio@jaxa.jp)
- Members: Makiko Hashimoto, Shin Ishida, Kenji Kowata, Fumie Kataoka, Yuki Kobayashi, Nobuhiro Kikuchi, Taro Makino, Tomoyuki Mabuchi, Hiroshi Suto, Hideki Suetake, Shigeaki Wada, Yugi Yata
Abstract
GOSAT-2 project retrieve and estimate the global concentration distribution of major greenhouse gases including the sources and natural absorbers with high level of accuracy to contribute to environmental administration as follows.
- Improved precision of climate change predictions
- Early detection of changes in the Earth system
- Better understanding of emission reduction level of the anthropogenic greenhouse gases and changing natural sink
- Contribution to air pollution monitoring policies
Also, GOSAT-2 project researches and develops new earth observation technologies required for future earth observing satellites.
Reference URL
Please refer to 'JAXA | Greenhouse gases Observing SATellite-2 "IBUKI-2" (GOSAT-2)'.
Reasons and benefits of using JAXA Supercomputer System
GOSAT-2 project utilizes JSS3 as one of the GOSAT-2 Mission Operation System which processes the observation data of GOSAT-2. When processing algorithm is updated, JSS2 reprocesses all data observed in the past. Also, JSS2 is used as a remote storage of all data required for its reprocessing.
As the reprocessing targets of GOSAT-2 products extends to all data observed in the past, more computer resources (core, memory, storage, etc.) are required than in the real-time processing.
It is necessary to use JSS3 to shorten the reprocessing time and to provide the reprocessing products to GOSAT-2 users in a more timely manner.
Achievements of the Year
We have been transmitting L0 data from the GOSAT-2 Mission Operation System to JSS3 in preparation for reprocessing of L1 products on JSS3 since observation by TANSO FTS-2 and TANSO-CAI-2 started.
March through April in FY2023, we have updated the L1 processing algorithm as follows;
- Version 220.221;
[L1A] None.
[L1B] Apply the corrected radiance factor using the radiance degradation factor reflecting the the on-orbit calibration data for the first five years after launch and the alternative calibration.
- Version 230.230;
[L1A] Update SWIR voltage conversion factor./Bug fix: L1 processing using time error information./Bug fix: Incorrect the observation time due to the L0 condition.
[L1B] Enable SWIR radiance variation correction./Bug fix: Same as above (L1A).
The FTS-2 L1A/B and CAI-2 L1A products have been available to general users from "GOSAT-2 Product Archive" (https://prdct.gosat-2.nies.go.jp/index.html.en) since July 2019.
Publications
N/A
Usage of JSS
Computational Information
- Process Parallelization Methods: N/A
- Thread Parallelization Methods: OpenMP
- Number of Processes: 1
- Elapsed Time per Case: 5 Minute(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.05
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
System Name | CPU Resources Used(Core x Hours) | Fraction of Usage*2(%) |
---|---|---|
TOKI-SORA | 0.00 | 0.00 |
TOKI-ST | 57467.63 | 0.06 |
TOKI-GP | 0.00 | 0.00 |
TOKI-XM | 0.00 | 0.00 |
TOKI-LM | 0.00 | 0.00 |
TOKI-TST | 0.00 | 0.00 |
TOKI-TGP | 0.00 | 0.00 |
TOKI-TLM | 0.00 | 0.00 |
File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
---|---|---|
/home | 200.00 | 0.13 |
/data and /data2 | 409600.00 | 1.96 |
/ssd | 0.00 | 0.00 |
Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
---|---|---|
J-SPACE | 339.45 | 1.11 |
*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
ISV Software Licenses Used
ISV Software Licenses Used(Hours) | Fraction of Usage*2(%) | |
---|---|---|
ISV Software Licenses(Total) | 0.00 | 0.00 |
*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2024-January 2025