Effect of earth albedo variation on the performance of a spatial acquisition subsystem aboard a planetary spacecraft

Details Effect of earth albedo variation on the performance of a spatial acquisition subsystem aboard a planetary spacecraft Effect of earth albedo variation on the performance of a spatial acquisition subsystem aboard a planetary spacecraft

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988tdar.nasa..202c&link_type=abstract

In its The Telecommunications and Data Acquisition Report p 202-211 (SEE N89-20329 13-32)

Physics

Algorithms, Earth Albedo, Optical Communication, Spacecraft Tracking, Brightness Distribution, Maximum Likelihood Estimates, Pointing Control Systems

Scientific paper

The effect of Earth albedo variation on the pointing and tracking subsystem of a planetary optical communication package is analyzed. By studying the Cramer-Rao bound of the tracking error variance, it is shown that, when the Earth albedo is precisely known, the variance in spatial tracking error is inversely proportional to the total signal count. In contrast, a small uncertainty in the Earth albedo can result in an irreducible error in the tracking subsystem.

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