Three-axis spacecraft attitude control using polar star sensor

Details Three-axis spacecraft attitude control using polar star sensor Three-axis spacecraft attitude control using polar star sensor

1990-04-19

1992-04-21

Black, Thomas G.

Boots, shoes, and leggings

364459, 244164, G06F 1550, B64G 124

Patent

active

051074346

ABSTRACT:
A three-axis attitude control system for a spacecraft in an equatorial orbit includes at least a horizon sensor for producing pitch-representative signals. A star sensor has a boresight parallel to the spacecraft pitch axis, and produces signals representative of the two-axis location of a selected pole star relative to the boresight. The star sensor signals are processed in conjunction with the pitch-representative signals and with orbit-location information, to produce roll and yaw information. The pitch, roll and yaw information controls spacecraft torquing. In a particular embodiment of the invention, the horizon sensor arrangement also produces roll signals, which are processed with the roll signals from the star sensor.

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"A Fast Attitude Recovery System for Communications Satellites: Experience of Eutelsat 5", by VanHoltz et al., published in connection with the 12th Annual AAS Guidance and Control Conference, Feb. 4-8, 1989 in Keystone, Colo.

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