GPS navigation using successive differences of carrier-phase...

Details GPS navigation using successive differences of carrier-phase... GPS navigation using successive differences of carrier-phase...

2007-05-01

2007-05-01

Phan, Dao L. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

10841689

ABSTRACT:
The present invention includes a process for navigating an object according to signals from satellites by propagating the position of the object forward in time using successive changes in the carrier-phase measurements. The process computes at a low rate matrices required for solving for the position of the objects, and repeatedly uses the most recently computed matrices to compute position updates at a high rate until the next low-rate computation is completed.

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PCT Search Report dated Jul. 5, 2005, International Application No. PCT/US2005/007259, International Filing Date Mar. 3, 2005.
Van Graas, F., et al., “High-Accuracy Differential Positioning for Satellite-Based Systems Without Using Code-Phase Measurements,” J. of the Institute of Navigation, vol. 42, No. 4, Winter 1995, pp. 605-618.
Chapt. 7, Sec. 7.8, “Ambiguity Fixing,”GPS Satellite Surveying, 3rd Ed., Editor—Alfred Leick, 2004, pp. 277-293.
Chapt. 4, “Least Squares Adjustments,”GPS Satellite Surveying, 3rd Ed., Editor—Alfred Leick, 2004, pp. 92-169.

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