Title: CHARACTERISTICS AND APPLICATIONS OF PRECISE GPS CLOCK SOLUTIONS EVERY 30 SECONDS
Author(s): J. F. Zumberge, M. M. Watkins, and F. H. Webb
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 44, Number 4
Pages: 449 - 456
Cite this article: Zumberge, J. F., Watkins, M. M., Webb, F. H., "CHARACTERISTICS AND APPLICATIONS OF PRECISE GPS CLOCK SOLUTIONS EVERY 30 SECONDS", NAVIGATION, Journal of The Institute of Navigation, Vol. 44, No. 4, Winter 1997-1998, pp. 449-456.
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Abstract: Using carrier phase and pseudorange data from a small network of globally distributed GPS receivers with precise time references, we are able to estimate GPS clock parameters every 30 s, with subdecimeter accuracy, in a computationally efficient manner. The accuracy obtained is a factor of 100 to 1000 times better than that of clocks in the broadcast navigation message, and allows post- processing of high-rate single-receiver kinematic GPS data with few-centimeter-level precision when used in conjunction with precise GPS orbits. The amplitude of the daily clock variability is typically 24 m for satellites affected by Selective Availability @A). Temporal variations are well modeled by an autocorrelation function p = exp( - d2 1272) with r = 106 s.