Analyses of landing site candidates for system-level technical studies
JAXA Supercomputer System Annual Report April 2020-March 2021
Report Number: R20EB0101
Subject Category: Space Exploration
- Responsible Representative: Hiroyuki Sato, Institute of Space and Astronautical Science, Lunar and Planetary Exploration Data Analysis Group
- Contact Information: JAXA Lunar and Planetary Exploration Data Analysis Group(z-JLPEDA@ml.jaxa.jp)
- Members: Takeshi Hoshino, Mitsuo Yamamoto, Hiroka Inoue, Hiroyuki Sato
Abstract
Using existing lunar and planetary exploration data, we analyzed the topography, temperature, and spectra of candidate landing sites for system-level technical studies of lunar polar landing missions.
Reference URL
Please refer to https://jlpeda.jaxa.jp/index_e.html .
Reasons and benefits of using JAXA Supercomputer System
The extremely high processing power of the JAXA supercomputer is essential to process the large amount of terabytes to petabytes of lunar and planetary exploration data and to obtain high-resolution results.
Achievements of the Year
A polar 9-band color map was created using the Multi-band Imager onboard JAXA's lunar exploration satellite SELENE. A high signal-to-noise ratio was achieved by using all images and giving the median value as each pixel value, instead of the conventional method of creating a mosaic image by stacking single images. The photometric correction was also made more accurate by taking the average of the observations under multiple illumination conditions.
Publications
- Poster Presentations
Sato, H., S. Goossens, M. Ohtake, Y. Daket. Polar Color Mosaic Production from Kaguya MI Data, 52nd LPSC, #1032, 2021.
Usage of JSS
Computational Information
- Process Parallelization Methods: N/A
- Thread Parallelization Methods: Automatic Parallelization
- Number of Processes: 1
- Elapsed Time per Case: 1 Hour(s)
Resources Used(JSS2)
Fraction of Usage in Total Resources*1(%): 0.03
Details
Please refer to System Configuration of JSS2 for the system configuration and major specifications of JSS2.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| SORA-MA | 0.00 | 0.00 |
| SORA-PP | 5,858.61 | 0.05 |
| SORA-LM | 0.00 | 0.00 |
| SORA-TPP | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 78.51 | 0.07 |
| /data | 53,121.24 | 1.03 |
| /ltmp | 5,977.07 | 0.51 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.00 | 0.00 |
*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(%): 0.04
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | Amount of Core Time(core x hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 0.00 | 0.00 |
| TOKI-RURI | 0.00 | 0.00 |
| TOKI-TRURI | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 291.91 | 0.20 |
| /data | 58,776.75 | 0.98 |
| /ssd | 151.00 | 0.08 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.00 | 0.00 |
*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