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Estimation and filtering for high-precision GPS positioning applicationsEstimation of GPS satellite orbits and other parameters for high-accuracy geodetic and tracking applications is carried out with a multi-satellite batch sequential pseudo-epoch state process noise filter. Both square-root information filtering and UD factorized covariance filtering and smoothing formulations are implemented in the software to enhance numerical stability. The filtering algorithms have been arranged to take advantage of sparse matrices and other characteristics of the GPS measurement scenarios. The filter includes unique error evaluation capabilities to assess effects from mismodeling. Process noise plays a key role in the orbit determination for stochastic behavior of transmitter/receiver clocks, atmospheric-induced delay fluctuations, and unmodeled spacecraft accelerations. Present GPS orbit accuracy is better than 1 m, with ground baselines determined simultaneously to relative accuracy of 1.5 parts in 10 to the 8th over several thousand km distance.
Document ID
19910027302
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lichten, Stephen M.
(JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Manuscripta Geodaetica
Volume: 15
ISSN: 0340-8825
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Accession Number
91A11925
Distribution Limits
Public
Copyright
Other

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