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Proceedings Paper

Tracking in a ground to satellite optical link: effects due to lead-ahead and aperture mismatch
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Paper Abstract

Establishing a link between a ground station and a geosynchronous orbiting satellite can be aided greatly with the use of a beacon on the satellite. A tracker, or even an adaptive optics system, can use the beacon during communications activities to correct beam pointing for atmospheric turbulence and mount jitter effects. However, the pointing lead-ahead required to illuminate the moving object and an aperture mismatch between the tracking and pointing apertures can limit the effectiveness of the correction as the sensed tilt will not be the same as the tilt required for optimal transmission to the satellite. In this paper we present an analytical model that addresses the combined impact of these tracking issues in a ground-to-satellite optical link. The analysis considers geosynchronous Earth orbit satellites as well as low Earth orbit satellites.

Paper Details

Date Published: 25 September 2007
PDF: 12 pages
Proc. SPIE 6709, Free-Space Laser Communications VII, 670914 (25 September 2007); doi: 10.1117/12.731510
Show Author Affiliations
Santasri Basu, New Mexico State Univ. (United States)
David Voelz, New Mexico State Univ. (United States)

Published in SPIE Proceedings Vol. 6709:
Free-Space Laser Communications VII
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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