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Proceedings Paper

Laser tracking test under satellite microvibrational disturbances by OICETS ATP system
Author(s): Takashi Jono; Morio Toyoshima; Nobuhiro Takahashi; Toshihiko Yamawaki; Keizo Nakagawa; Akio Yamamoto
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Paper Abstract

Free-space laser communication systems offer many advantages such as high data rate, small sized equipment, low consumption electric power and others. There are, however, many development factors to construct a realistic laser communication system in space. Precise Acquisition, Tracking, and Pointing (ATP) functions are key issue to establish the laser communication system in space. OICETS (Optical Inter-orbit Communications Engineering Test Satellite) has been developed by National Space Development Agency of Japan (NASDA) to verify an optical data link technology in space. ATP functions of the OICETS satellite for a laser inter-orbit link system must be controlled with an angular accuracy better than a few micro radian under vibrational disturbances of the host satellite. The microvibrational disturbances continually come from the satellite subsystem operations such as reaction wheels, solar paddle motors, scan sensors and so on. NASDA performed an on-ground microvibration test to evaluate vibration characteristics of the OICETS satellite and to verify laser tracking performances of the ATP system. The test was carried out by using a simulated OICETS satellite that consists of a mechanical structure model and an engineering model of the laser communication terminal. The mechanical structure model is equipped with some flight components and mass dummy components. The satellite is suspended from a lifting tackle by four straps and the free-free configuration was simulated using a suspension device. As a result, the incremental residual tracking error of 0.19 micro radians was measured due to the microvibration of the disturbing sources from the satellite platform.

Paper Details

Date Published: 1 July 2002
PDF: 8 pages
Proc. SPIE 4714, Acquisition, Tracking, and Pointing XVI, (1 July 2002); doi: 10.1117/12.472581
Show Author Affiliations
Takashi Jono, National Space Development Agency of Japan (Japan)
Morio Toyoshima, National Space Development Agency of Japan (Japan)
Nobuhiro Takahashi, National Space Development Agency of Japan (Japan)
Toshihiko Yamawaki, National Space Development Agency of Japan (Japan)
Keizo Nakagawa, National Space Development Agency of Japan (Japan)
Akio Yamamoto, National Space Development Agency of Japan (Japan)

Published in SPIE Proceedings Vol. 4714:
Acquisition, Tracking, and Pointing XVI
Michael K. Masten; Larry A. Stockum, Editor(s)

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