Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Aeronautical vehicle
Patent
1998-08-31
2000-08-08
Zanelli, Michael J.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Aeronautical vehicle
701215, 34235711, G05D 108
Patent
active
061014303
ABSTRACT:
An improved GPS Attitude Receiver for spacecraft uses concurrent line-bias estimates derived from GPS signals for attitude determination. Attitude determination is obtained from GPS measurements by an interactive solution of the known "Attitude Master Equation", using RF differential phase measurements and calibrated parameters of baseline vectors and line-biases. A "weighted fit error" W, is derived from the sum squared of discrepancies between predicted and actual measurements, weighted by measurement variances. By minimizing W, the line-bias estimations obtained give more current data including thermal effects and eliminate separate ground calibration tests.
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Johnson, W.; Attitude adjustment: GPS innovation keeps satellite oriented; Satellite Communications; vol. 19, iss. 6; Jun. 1995.
Fuller Richard A.
Rodden John J.
Space Systems Loral, Inc.
Zanelli Michael J.
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