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ALOS-2 / PALSAR-2 data processing for the entire observation period

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23EAR10600

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: Daisuke Fukai, Takashi Goto, Naoyoshi Hirade, Hidetoshi Hayasaka, Osamu Isoguchi, Koichi Imamura, Fumio Kudoh, Yusuke Kobayashi, Yasuhiro Kawashima, Shunsuke Murakami, Taroh Mutoh, Hidekazu Mikai, Toshimi Nakata, Katsuyuki Otsuka, Masahiro Ogawa, Yohei Tsujimoto, Hiroyuki Yokokawa, Shoma Yamada, Nobuhiro Yamauchi

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 products (Analysis Ready Data), Make an offer.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

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

As part of this, JAXA needs to process a large amount of data for the entire observation period of ALOS-2 / PALSAR-2, and quickly release user-friendly image data.

To achieve this, JSS2 processing was optimal, so we used it.(Up to 100 parallel processing)

Achievements of the Year

This year, the processing of PLASAR-2 data with JSS3 is as follows:

L1.1:23618 scenes

L2.2:21242 scenes

Total: 44860 scenes

Data that has been archived or processed this year has been provided to other system users.

1)Ask the user institution to obtain a JSS-ID and download it from JSS (obtained by the user)

Acquisition of PALSAR-2 ScanSAR L1.1 by NASA-ASF

2)Transmission via server (put from JAXA)

Asia region L2.2 transmission via Chofu transmission relay server to Sakura Internet/Tellus

L2.2 transmission in Asia, Africa, and Central and South America via Chofu transmission relay server to GEE

3)Transferred to G-Portal server via data transmission server during order processing on G-Portal (obtained by G-Porta user)

PALSAR-2 L1.1 (11345 scenes), L2.2 (1949 scenes) by the end of February 2024

4)From J-SPACE to ALOS-4/EICS (subsystem)

PALSAR-2 L0 data

In addition, for program verification, we replaced MDPS on JSS3 and conducted a test process.

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: N/A
  • Thread Parallelization Methods: OpenMP,pthread,boost::thread
  • Number of Processes: 1
  • Elapsed Time per Case: 1 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.16

 

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 1244309.20 1.34
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 182.50 0.15
/data and /data2 111083.33 0.69
/ssd 836.67 0.08

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 7618.31 27.45

*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 2023-January 2024