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Upper Weather Prediction

JAXA Supercomputer System Annual Report April 2019-March 2020

Report Number: R19EG3108

Subject Category: Research and Development

PDF available here

  • Responsible Representative: Hideaki Hinagawa, Space Tracking and Communications Center, Flight Dynamics Team
  • Contact Information: Hideaki Hinagawa, Space Tracking and Communications Center, Flight Dynamics Team(hinagawa.hideaki@jaxa.jp)
  • Members: Hiroshi Kato, Noriyuki Ohi, Yoshihiro Kasai, Daichi Obinata, Masaya Nakano, Yoshihide Sugimoto, Hideaki Hinagawa, Yuki Akiyama

Abstract

This study aims to develop the reanalysis system for upper atmospheric density to improve the satellite orbit prediction accuracy.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

In order to realize atmospheric density reanalysis, it is required to perform atmospheric density model calculation with many calculation conditions simultaneously.

Achievements of the Year

The dveloped data assimilation system called SUBARU was established. SUBARU has three atmospheric density models, and we confirmed that SUBARU worked without problems in the case of one data assimilation parameter. Futhermore, we completed a system to compute orbital ephemeris generation using the density data provided from SUBARU. We are working on evaluation of the generated ephemeris.

Publications

– Oral Presentations

Hiroshi Kato, Hideaki Hinagawa, Kyohei Akiyama, Yuki Akiyama, Masaya Nakano, Daichi Obinata, and Shinichi Nakamura, ” Development of Data Assimilation System for Atmospheric Density to Improve Satellite’s Orbit Prediction Accuracy”, JpGU 2019, May, 2019, Makuhari, Japan.

Usage of JSS2

Computational Information

  • Process Parallelization Methods: N/A
  • Thread Parallelization Methods: Automatic Parallelization
  • Number of Processes: 1
  • Elapsed Time per Case: 20 Minute(s)

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 56,117.64 0.01
SORA-PP 174,881.43 1.13
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 98.55 0.08
/data 82,106.31 1.41
/ltmp 9,309.90 0.79

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 7.85 0.20

*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 2019-March 2020