ALOS / PRISM data processing

JAXA Supercomputer System Annual Report February 2024-January 2025

Report Number: R24ER0100

Subject Category: Space Technology

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 Goto, Hidetoshi Hayasaka, Fumio Kudoh, Shunsuke Murakami, Shouko Morisaki, Taroh Mutoh, Hidekazu Mikai, Toshimi Nakata, Katsuyuki Otsuka, Kazuhiro Oka, Nozomi Sakuma, Hiroyuki Yokokawa, Tadahiro Yamamoto

Abstract

We process data obtained from the Synthetic Aperture Radar (PALSAR), AVNIR-2, and PRISM by the Advanced Land Observing Satellite "Daichi," and generate and provide user-friendly image products (Analysis Ready Data).

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

JAXA is working to make Earth observation satellite data publicly available in order to expand the use of such data.

As part of this, the previous system, JSS2, processes data from the entire observation period of ALOS/PALSAR, and archives large amounts of data on J-SPACE.

As for AVNIR-2, 1B1/1B2 data is also archived.

This year, some processing was carried out on PRISM L1B1/L1B2 data.

The JSS system was used to provide this data to external users as quickly as possible.

Achievements of the Year

This year, PRISM processed L1B1 and L1B2 data for the Japanese region.

The processed results are:

Number of downlink segments: 92 paths

Number of products created: 24,818 (L1B1: 18,676, capacity 5.62Tib L1B2: 6,142, capacity 1.07Tib)

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: 1 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.01

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	1366.09	0.00
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	167.50	0.11
/data and /data2	105779.83	0.51
/ssd	0.00	0.00

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	2468.24	8.07

*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.