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

JAXA Supercomputer System Annual Report April 2017-March 2018

Report Number: R17ER3500

Subject Category: Space Technology

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

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

In the process of manufacturing and testing of the GOSAT-2 MOS (Mission Operation System), we completed the following test with JSS2.

(1)Interface test between GOSAT-2 MOS and JSS2

To confirm the interface specification which is defined in ICD between GOSAT-2 MOS and JSS2.

(2)Reprocessing test with JSS2

To confirm the reprocessing function of GOSAT-2 MOS can be worked with JSS2 as system requirement.

To confirm the reprocessing performance of GOSAT-2 MOS with JSS2.

Publications

N/A

Usage of JSS2

Computational Information

Process Parallelization Methods: N/A
Thread Parallelization Methods: N/A
Number of Processes: 1
Elapsed Time per Case: 5.00 minutes

Resources Used

Fraction of Usage in Total Resources*1(%): 0.09

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	635.79	0.01
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	163.72	0.11
/data	100,930.58	1.87
/ltmp	33,528.66	2.53

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