JAXA Supercomputer System Annual Report (April 2018-March 2019)

Greenhouse gases Observing SATellite-2 (GOSAT-2) Project
Report Number: R18ER3500
Subject Category: Space Technology
URL: https://www.jss.jaxa.jp/en/ar/e2018/9162/
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 asfollows.
- 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 naturalsink- Contribution to air pollution monitoring policies
Also, GOSAT-2 project researches and develops new earth observation technologies required for future earth
observing satellites.
Ref. URL: http://global.jaxa.jp/projects/sat/gosat2/Reasons for using JSS2GOSAT-2 project utilizes JSS2 as one of the GOSAT-2 Mission Operation System which processes theobservation data of GOSAT-2. When processing algorithm is updated, JSS2 reprocesses all data observed in thepast. 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 computerresources (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 GOSAT2 users more quickly.

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JAXA Special Publication JAXA-SP-19-003E

Achievements of the Year
1, In the development and testing process of GOSAT-2 Mission Operation System, G2MOS, tests below havebeen 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
Computational Resources
System Name

Amount of Core Time(core x hours)

Fraction of Usage*2 (%)

SORA-MA

0.00

0.00

SORA-PP

73,710.34

0.59

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

151.320.16/data

100,682.62

1.78/ltmp

30,989.60

2.65

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JAXA Supercomputer System Annual Report (April 2018-March 2019)

Archiver Resources
Archiver Name

Storage Used (TiB)

J-SPACE

Fraction of Usage*2 (%)
0.01

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.

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