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Optical Engineering

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

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 2048 Hz. 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 1024 Hz 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.

Paper Details

Date Published: 1 August 2010
PDF: 10 pages
Opt. Eng. 49(8) 083604 doi: 10.1117/1.3482165
Published in: Optical Engineering Volume 49, Issue 8
Show Author Affiliations
Morio Toyoshima, National Institute of Information and Communications Technology (Japan)
Yoshihisa Takayama, National Institute of Information and Communications Technology (Japan)
Hiroo Kunimori, National Institute of Information and Communications Technology (Japan)
Takashi Jono, Japan Aerospace Exploration Agency (Japan)
Shiro Yamakawa, Japan Aerospace Exploration Agency (Japan)

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