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US 6,629,672 B1Granted
Sun sensor alignment compensation system
AssigneeLockheed Martin Corporation
InventorsNeil Evan Goodzeit, Xipu Li
Life of this patent
Estimating the term…
Abstract
A method for correcting differences in measurements between sensors. Misalignment of a roll error of a sun sensor alignment is estimated with respect to a reference roll value measured by an earth sensor. Sun sensor assembly elevation angle residual is calculated utilizing the estimated sun sensor assembly roll misalignment. A yaw attitude of the spacecraft is updated based upon the calculated sun sensor assembly elevation residual.
Claims13
A method for correcting differences in measurements between sensors, the method comprising:
- estimating misalignment of a roll error of a sun sensor alignment with respect to a reference roll value measured by an earth sensor;
- calculating sun sensor assembly elevation angle residual utilizing the estimated sun sensor assembly roll misalignment;
- and
- updating a yaw attitude of a spacecraft based upon the calculated sun sensor assembly elevation residual.
1 more element
A spacecraft attitude control system, comprising:
- a controller operable to estimate misalignment of a roll error of a sun sensor alignment with respect to a reference roll value measured by an earth sensor, calculate sun sensor assembly elevation angle residual utilizing the estimated sun sensor assembly roll misalignment, and update a yaw attitude of the spacecraft based upon the calculated sun sensor assembly elevation residual.
Dependencies are inferred from the claim text.