Small synthetic aperture radar satellite

JAXA Supercomputer System Annual Report April 2016-March 2017

Report Number: R16E0068

Responsible Representative: Takahiro Yamada(Institute of Space and Astronautical Science, Division of Spacecraft Engineering)
Contact Information: Hirobumi Saito(saito.hirobumi@jaxa.jp)
Members: Tomoya Fukami, Vinay Ravindra, Hirobumi Saito, Kengo Ando, Pyne Budhaditya, Prilando Rizki Akbar
Subject Category: Space(Space utilization)

Abstract

We are goint to develop synthetic aperture radar system that can be onboard on a 100kg class satellite and to verify it on ground. Conventionally radar observations have required large or medium satellite with 500-1000kg mass. Our research and development may change earth observation drastically.

Goal

The purpose of this project is to develop synthetic aperture radar system that is compatible to 100kg class satellite in order to realize on-demand, all weather earth observation system as well as constellation mission.

Objective

We are going to develop synthetic aperture radar system that can be onboard on a 100kg class satellite and to verify it on ground.

References and Links

Please refer ‘English Home of 齋藤宏文研究室‘.

Please refer ‘Impulsing Paradigm Change through Disruptive Technologies Program ImPACT: R&D Programs‘.

Use of the Supercomputer

We utilize super-computer for design of slot array antennas dedicated for small synthetic aperture radar.

Necessity of the Supercomputer

Design of slot array antenna requires a super-computer that is provided with high speed and large memory.

Achievements of the Year

We performed 3 dimensional electro-magnetic simulation for slot array antenna with size of 70cm x70cm. Figure 1 is an aperture amplitude distribution and Figure 2 is an aperture phase distribution.

Fig.1:The simulated distribution of aperture amplitude at 9.65 GHz.

Fig.2:The simulated distribution of aperture : phase at 9.65 GHz

Publications

Presentations

1) Prilando Rizki Akbar, Pyne Budhaditya, Hirobumi Saito Jiro Hirokawa. ‘Current State of Antenna Design for X-band SAR Sensor onboard 100 Kg Class Satellite,’ Eucap 2017, Paris, March 2017.

Computational Information

Parallelization Methods: Hybrid Parallelization
Process Parallelization Methods: MPI
Thread Parallelization Methods: OpenMP
Number of Processes: 6
Number of Threads per Process: 8
Number of Nodes Used: 4
Elapsed Time per Case (Hours): 48
Number of Cases: 100

Resources Used

Total Amount of Virtual Cost(Yen): 1,552,640

Breakdown List by Resources

Computational Resources
System Name	Amount of Core Time(core x hours)	Virtual Cost(Yen)
SORA-MA	215,092.29	351,301
SORA-PP	35,823.99	305,865
SORA-LM	34,909.52	785,464
SORA-TPP	0.00	0

SORA-FS File System Resources
File System Name	Storage assigned(GiB)	Virtual Cost(Yen)
/home	57.22	509
/data	572.20	5,097
/ltmp	11,718.76	104,402

J-SPACE Archiving System Resources
Archiving System Name	Storage used(TiB)	Virtual Cost(Yen)
J-SPACE	0.00	0

Note: Virtual Cost=amount of cost, using the unit price list of JAXA Facility Utilization program(2016)