Attitude determination and control system for the first SAR satellite in a constellation of iQPS

Paper number

IAC-20,C1,8,12,x60372

Author

Dr. Dmytro Faizullin, Japan, Institute for Q-shu Pioneer of Space, Inc. (iQPS)

Coauthor

Dr. Masahiko Uetsuhara, Japan, Institute for Q-shu Pioneer of Space, Inc. (iQPS)

Coauthor

Mr. Ryosuke Takahira, Japan, Institute for Q-shu Pioneer of Space, Inc. (iQPS)

Coauthor

Mr. Junichi Murayama, Japan, Institute for Q-shu Pioneer of Space, Inc. (iQPS)

Coauthor

Mr. Masaru Katayama, Japan

Coauthor

Dr. Shunsuke Onishi, Japan, Institute for Q-shu Pioneer of Space, Inc. (iQPS)

Coauthor

Prof. Tetsuo Yasaka, Japan, Institute for Q-shu Pioneer of Space, Inc. (iQPS)

Year

2020

Abstract

Earth remote sensing has great importance for economics, military and defence, disaster management. There are already a lot of satellites with optical and radar technologies in orbit. However, a request for high resolution with frequent revisiting remote sensing is existed. It is important for infrastructure management, marine and fishery, agriculture, autonomous driving, etc. Synthetic Aperture Radar (SAR) technology have advantages for these purposes: no dependence from weather and light conditions for performing monitoring required locations.
A project for building a constellation with 36 SAR satellites was started by Institute for Q-shu Pioneers of Space, Inc. (iQPS). It is planned to perform Earth monitoring with 10 minutes interval.
IZANAGI satellite, the first satellite in the constellation, was successfully launched on December 11, 2019. The satellite combines compact size, light weight (100kg) and high resolution (1m).
An attitude determination and control system (ADCS) is one of key subsystems for a satellite mission success. The importance of the subsystem considerably increases when the main payload is SAR. It requires high precision and stability of attitude pointing ($<$0.1deg) to a commanded direction for performing SAR observation and also for Ku band data downlink.
This work will describe 1) IZANAGI’s ADCS overview, 2) initial, safety and nominal operation modes, 3) software/hardware in the loop testing with the use of AGI Systems Tool Kit (STK), 4) lessons learned to be implemented in the 2nd satellite of the constellation (planned to be launched in the 2nd part of 2020).

Abstract document

IAC-20,C1,8,12,x60372.brief.pdf

Manuscript document

IAC-20,C1,8,12,x60372.pdf (🔒 authorized access only).

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