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Greenhouse gases Observing SATellite-2 (GOSAT-2) Project

JAXA Supercomputer System Annual Report April 2020-March 2021

Report Number: R20ER3500

Subject Category: Space Technology

PDF available here

  • Responsible Representative: KUZE Akihiko, GOSAT-2 Project Team, Space Technology Directorate I
  • Contact Information: Yoko Ueda(ueda.yoko@jaxa.jp)
  • Members: Yoko Ueda, Tomoo Yamasaki, Yuki Kobayashi, Taro Makino, Yugi Yata, Shin Ishida, Junichi Takaku, Kenji Kowata, Takehito Yoshida, Fumie Kataoka, Makiko Hashimoto, Hideyuki Noguchi, Hideki Suetake, Tomoyuki Mabuchi, Nobuhiro Kikuchi, Hiroshi Suto

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 JSS2 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 JSS2 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 JSS2 in preparation for reprocessing of L1 products on JSS2 since observation by TANSO FTS-2 and TANSO-CAI-2 started.

In FY2020, we have updated the L1 processing algorithm for TANSO-FTS-2 two times and TANSO-CAI-2 one time and reprocessed the past observation data on JSS2 each time.

The version-up history of GOSAT-2 TANSO-FTS-2 1B product is shown below.

- Version 102.102 : May.2020 FCE correction and complex sensitivity calibration algorithm correction (TIR), Corrects the brightness degradation correction factor and the brightness conversion factor. (SWIR), Adding Attributes

- Version 200.200 : Oct.2020 Adoption of polarization correction for TIR calibration equation, Data format change for adding calibration supplemental information

The version-up history of GOSAT-2 TANSO-CAI-2 1A product is shown below.

- Version 102.102 : May.2020 Adding Attributes, Bug fixes

The FTS-2 L1B and CAI-2 L1B product has been available to general users from "GOSAT-2 Product Archive" (https://prdct.gosat-2.nies.go.jp/en/index.html) 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)

Resources Used(JSS2)

 

Fraction of Usage in Total Resources*1(%): 0.10

 

Details

Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
SORA-MA 0.00 0.00
SORA-PP 29,529.51 0.23
SORA-LM 0.00 0.00
SORA-TPP 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 150.14 0.14
/data 129,955.90 2.51
/ltmp 30,747.78 2.62

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.00 0.00

*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.

 

Resources Used(JSS3)

 

Fraction of Usage in Total Resources*1(%): 0.07

 

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
TOKI-SORA 0.00 0.00
TOKI-RURI 18.90 0.00
TOKI-TRURI 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 164.44 0.11
/data 98,347.03 1.65
/ssd 690.73 0.36

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.00 0.00

*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.

JAXA Supercomputer System Annual Report April 2020-March 2021


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To use JSS3, please refer to "How to use JSS3" page .

Location

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