Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Aeronautical vehicle
Reexamination Certificate
2006-12-05
2010-02-23
Nguyen, Tan Q (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Aeronautical vehicle
C701S004000, C701S226000, C342S357490, C342S358000
Reexamination Certificate
active
07668629
ABSTRACT:
A GNSS ultra-tight coupling (UTC) receiver architecture applicable to space borne orbit platforms is described. A receiver in accordance with this architecture retains the rotational motion sensors typically found in an inertial measurement unit (IMU) of a conventional UTC receiver, but replaces the IMU accelerometer sensors with precise orbital dynamics models to predict the translational motion of the platform center of gravity (CG). Drag and radiation pressure may be modeled as well. The various models can be implemented in software. The IMU rotational sensors are retained for compensation of the GNSS antenna lever arm effect due to platform rotation.
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J.A. Tekawy, Precision Spacecraft Attitude Estimators Using an Optical Payload Pointing System, Journal of Spacecraft and Rockets, vol. 35, No. 4, Jul.-Aug. 1998, pp. 480-486.
DiEsposti Raymond S
Tekawy Jonathan A
Brosemer, Kolefas & Assoc. LLC
Nguyen Tan Q
The Boeing Company
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