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ALOS / PALSAR data processing for the entire observation period

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22ER0100

Subject Category: Space Technology

PDF available here

  • Responsible Representative: Sobue Shin-ichi,Associate Chief office of Earth Observation Missions,Space Technology Directorate I
  • Contact Information: Kudoh fumio(kudoh.fumio@jaxa.jp)
  • Members: Takashi Asama, Risako Dan, Masanori Doutsu, Takashi Goto, Kouji Hagiwara, Hidetoshi Hayasaka, Takashi Ikeda, Keiko Ishii, Fumio Kudoh, Hirotaka Kurokawa, Yota Makinae, Shunsuke Murakami, Satoru Matsuda, Nobuhiro Muramoto, Shouko Morisaki, Taroh Mutoh, Hidekazu Mikai, Toshimi Nakata, Yukie Nakagawa, Katsuyuki Otsuka, Kazuhiro Oka, Akiko Otomo, Fumi Ohgushi, Atsushi Shimizu, Koji Sakurai, Hidenori Sakamoto, Emi Satake, Nozomi Sakuma, Jumpei Tsutsumi, Daisuke Tokko, Hiroyuki Yokokawa, Keigo Yoshino, Takuto Yokoi, Shoma Yamada, Shino Yamaguchi, Nobuhiro Yamauchi, Ryota Yanai, Tadahiro Yamamoto

Abstract

Processing the synthetic aperture radar (PALSAR / PALSAR-2) data acquired by the terrestrial observation technology satellites “ DAICHI ” and “ DAICHI-2 ” to generate user-friendly image

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

JAXA is developing data disclosure to expand the use and spread of earth observation satellite data.

As part of this, the previous system JSS2 processes the data for the entire ALOS / PALSAR observation period and archives a large amount of data in J-SPACE.

We used the JSS system to quickly provide this data to external users. (Provided via medium (NAS) or transmission server.)

Achievements of the Year

ALOS PRISM(L1B1/L1B2), AVNIR-2(L1B1/L1B2), PALSAR(L1.1/L2.2) are processed in parallel on JSS3.

Use TOKI-RURI, TOKI-FS, J-SPACE, TOKI-LI.

This fiscal year, we implemented PRISM and AVNIR-2 processing.

Processing 100 PRISMs in parallel:

PRISM L1B1 processing time about 2.7~3.9 years

PRISM L1B2 processing time about 1.2~1.9 years

Total about 3.9~5.8 years

Processing AVNIR-2 with 40-50 parallels:

L1B1 processing time about 23.5 days to 26.8 days

L1B2 processing time about 38.6 days to 53.4 days

Total about 62.1 days to 80.2 days

*AVNIR-2 has a short processing time, and the test processing is finished before 100 parallels are reached. Therefore, the parallel number is not “100”.

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: N/A
  • Thread Parallelization Methods: N/A
  • Number of Processes: 1
  • Elapsed Time per Case: 16 Minute(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.00

 

Details

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

Computational Resources
System Name CPU Resources Used
(Core x Hours)
Fraction of Usage*2(%)
TOKI-SORA 0.00 0.00
TOKI-ST 5774.71 0.01
TOKI-GP 0.00 0.00
TOKI-XM 0.00 0.00
TOKI-LM 0.00 0.00
TOKI-TST 0.00 0.00
TOKI-TGP 0.00 0.00
TOKI-TLM 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 288.33 0.26
/data and /data2 107116.49 0.83
/ssd 1453.33 0.20

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 2178.63 9.66

*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.

 

ISV Software Licenses Used

ISV Software Licenses Resources
ISV Software Licenses Used
(Hours)
Fraction of Usage*2(%)
ISV Software Licenses
(Total)
0.00 0.00

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report February 2022-January 2023