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Fast Integer Ambiguity Resolution for GPS Attitude DeterminationIn this paper, a new algorithm for GPS (Global Positioning System) integer ambiguity resolution is shown. The algorithm first incorporates an instantaneous (static) integer search to significantly reduce the search space using a geometric inequality. Then a batch-type loss function is used to check the remaining integers in order to determine the optimal integer. This batch function represents the GPS sightline vectors in the body frame as the sum of two vectors, one depending on the phase measurements and the other on the unknown integers. The new algorithm has several advantages: it does not require an a-priori estimate of the vehicle's attitude; it provides an inherent integrity check using a covariance-type expression; and it can resolve the integers even when coplanar baselines exist. The performance of the new algorithm is tested on a dynamic hardware simulator.
Document ID
19990063852
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Lightsey, E. Glenn
(Texas Univ. Austin, TX United States)
Crassidis, John L.
(Texas A&M Univ. College Station, TX United States)
Markley, F. Landis
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Aircraft Communications And Navigation
Report/Patent Number
AIAA Paper 99-3967
Meeting Information
Meeting: Guidance, Navigation and Control
Location: Portland, OR
Country: United States
Start Date: August 9, 1999
End Date: August 11, 1999
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NAG5-7130
Distribution Limits
Public
Copyright
Other

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