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ALOS / PALSAR data processing for the entire observation period

JAXA Supercomputer System Annual Report April 2020-March 2021

Report Number: R20ER0100

Subject Category: Space Technology

PDF available here

  • Responsible Representative: Sobue Shin-ichi, ALOS-2 Project Manager(Associate Principal Engineer),Space Technology Directorate I
  • Contact Information: Kudoh fumio(kudoh.fumio@jaxa.jp)
  • Members: Hidetoshi Hayasaka, Takashi Goto, Fumi Ohgushi, Masanori Doutsu, Takashi Ikeda, Nobuhiro Muramoto, Kouji Hagiwara, Tadahiro Yamamoto, Taroh Mutoh, Kazuhiro Oka, Toshimi Nakata, Katsuyuki Otsuka, Shunsuke Murakami, Hirotaka Kurokawa, Hiroyuki Yokokawa, Shino Yamaguchi, Fumio Kudoh, Hidekazu Mikai

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

Please refer to ‘JAXA | Advanced Land Observing Satellite "DAICHI" (ALOS)‘.

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 / PALSAR and ALOS-2 / PALSAR-2, and quickly release user-friendly image data. To achieve this, JSS2 processing was optimal, so we used it.(Up to 350 parallel processing)

Achievements of the Year

This year’s processing results.

L2.2 processing of PALSAR in Japan

FBD: 37,711 scenes

FBS: 49,023 scenes

PLR: 7,364 scenes

WB1: 1,662 scenes

WB2: 5 scenes

Processing of PALSAR outside Japan

FBD (L1.1: 568,670, L2.2: 638,759 scenes)

FBS (L1.1: 684,362, L2.2: 389,318 scenes)

PLR (L1.1: 218,529, L2.2: 3,606 scenes)

DSN (L1.1: 4,135, L2.2: 1,085 scenes)

WB1 (L2.2: 116,055 scenes)

WB2 (L2.2: 762 scenes)

Annual Reoprt Figures for 2020

Fig.1: PALSAR-2/SCANSAR L2.2@Netherlands(2010/8/12 observation, scene ID: ALPSRS242342550)

 

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: 10 Minute(s)

Resources Used(JSS2)

 

Fraction of Usage in Total Resources*1(%): 1.55

 

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 2,604,450.21 20.41
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 235.24 0.22
/data 105,422.39 2.04
/ltmp 29,036.47 2.47

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 73.79 2.44

*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.

 

Resources Used(JSS3)

 

Fraction of Usage in Total Resources*1(%): 0.08

 

Details

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

Computational Resources
System Name Amount of Core Time
(core x hours)
Fraction of Usage*2(%)
TOKI-SORA 0.00 0.00
TOKI-RURI 2.00 0.00
TOKI-TRURI 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 272.59 0.19
/data 103,619.77 1.74
/ssd 1,128.52 0.59

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 73.79 2.44

*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 2020-March 2021