On-board clear-airturbulence prediction

JAXA Supercomputer System Annual Report February 2024-January 2025

Report Number: R24EDA201D00

Subject Category: Aeronautical Technology

PDF available here

Responsible Representative: Tetsuya Nagashima, Aviation Technology Directorate, Aviation Safety Innovation Hub
Contact Information: Tetsuya Nagashima(nagashima.tetsuya@jaxa.jp)
Members: Hirokazu Higashida, Tetsuya Nagashima, Naoki Nishikawa, Takayuki Sakurai

Abstract

CAT (clear-air turbulence) simulations for research on on-board CAT prediction system.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

JSS is used to simulate the clear-air turbulence encountered by aircraft in weather analysis programmes.

Achievements of the Year

Strong turbulence, where aircraft encounter strong turbulence, was simulated using the Weather Research Forecasting Model (WRF). As the turbulence of interest is a local phenomenon with a wavelength of 800 m to 4,000 m, a simulation method was established for turbulence causing more than moderate turbulence, using a grid with a pitch of about 50 m, which is finer than the grid used in normal weather simulations.

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: N/A
Number of Processes: 1 - 64
Elapsed Time per Case: 24 Hour(s)

JSS3 Resources Used

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.

Computational Resources
System Name	CPU Resources Used (Core x Hours)	Fraction of Usage*2(%)
TOKI-SORA	1038070.20	0.05
TOKI-ST	0.00	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	245.00	0.17
/data and /data2	23482.00	0.11
/ssd	0.00	0.00

Archiver Resources
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.

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.