JAXA Supercomputer System Annual Report April 2018-March 2019

Report Number: R18ER3500

Subject Category: Space Technology

PDF available here

• Responsible Representative: Takeshi Hirabayashi, GOSAT-2 Project Team, Space Technology Directorate I
• Contact Information: Shin Ishida(ishida.shin@jaxa.jp)
• Members: Yoko Ueda, Tomoo Yamasaki, Yoshiyuki Hirosaki, Yuki Kobayashi, Taro Makino, Atsuhiko Murakami, Takaaki Nishino, Kouhei Sugimoto, Yugi Yata, Shin Ishida, Kenji Kowata, Takehito Yoshida, Fumie Kataoka, Makiko Hashimoto, Hideyuki Noguchi, Atsushi Sugano

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 for using JSS2

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 more quickly.

Achievements of the Year

1, In the development and testing process of GOSAT-2 Mission Operation System, G2MOS, tests below have been completed.

-Ground system integration test

-End-to-End test

-Final pre-launch test

2. The file transfer from G2MOS to JSS2 started after GOSAT-2 launch. No interface troubles between G2MOS and JSS2 have occurred.

Publications

N/A

Usage of JSS2

Computational Information

• Process Parallelization Methods: N/A
• Thread Parallelization Methods: OpenMP
• Number of Processes: 1
• Elapsed Time per Case: 5 Minute(s)

Resources Used

Fraction of Usage in Total Resources*1(%): 0.13

Details

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

*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 2018-March 2019