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Instrumentation, Measurement, and Metrology

In-orbit measurements of spacecraft microvibrations for satellite laser communication links

[+] Author Affiliations
Morio Toyoshima

National Institute of Information and Communications Technology, New Generation Wireless Communications Research Center, Space Communications Group, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan

Yoshihisa Takayama

National Institute of Information and Communications Technology, New Generation Wireless Communications Research Center, Space Communications Group, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan

Hiroo Kunimori

National Institute of Information and Communications Technology, New Generation Wireless Communications Research Center, Space Communications Group, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan

Takashi Jono

Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan

Shiro Yamakawa

Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan

Opt. Eng. 49(8), 083604 (August 25, 2010). doi:10.1117/1.3482165
History: Received December 17, 2009; Revised July 04, 2010; Accepted July 09, 2010; Published August 25, 2010; Online August 25, 2010
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Angular microvibrations of platform jitter on the optical inter-orbit communications engineering test satellite are measured in space during ground-to-satellite laser communication links. The microaccelerations are measured by the onboard accelerometers at a sampling rate of 2048Hz. The angular microvibrations are estimated from the measured microaccelerations using the tracking characteristics of the laser communications terminal and the conversion factor on the basis of microvibration data obtained from ground-based tests. The power spectral density (PSD) of the satellite microvibrations is analyzed by using the fast Fourier transform analysis and the data length is examined according to the frequency resolution of the PSD. The in-orbit measurements of the PSDs are compared with those obtained from the ground test. The angular microvibrational base motion is estimated and a PSD up to 1024Hz is additionally provided as a database of the real measurement results with previously obtained in-orbit measurements. The measured results will contribute to the angular jitter estimation and the design of a tracking control loop for space laser communication systems in the future.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Morio Toyoshima ; Yoshihisa Takayama ; Hiroo Kunimori ; Takashi Jono and Shiro Yamakawa
"In-orbit measurements of spacecraft microvibrations for satellite laser communication links", Opt. Eng. 49(8), 083604 (August 25, 2010). ; http://dx.doi.org/10.1117/1.3482165


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