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Precise GPS ephemerides from DMA and NGS tested by time transferIt was shown that the use of the Defense Mapping Agency's (DMA) precise ephemerides brings a significant improvement to the accuracy of GPS time transfer. At present a new set of precise ephemerides produced by the National Geodetic Survey (NGS) has been made available to the timing community. This study demonstrates that both types of precise ephemerides improve long-distance GPS time transfer and remove the effects of Selective Availability (SA) degradation of broadcast ephemerides. The issue of overcoming SA is also discussed in terms of the routine availability of precise ephemerides.
Document ID
19920024111
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
W. Lewandowski (International Bureau of Weights and Measures Saint-Cloud, France)
G. Petit (International Bureau of Weights and Measures Saint-Cloud, France)
C. Thomas (International Bureau of Weights and Measures Saint-Cloud, France)
Date Acquired
September 6, 2013
Publication Date
December 3, 1991
Publication Information
Publication: 23rd Annual Time and Time Precise Interval (PTTI) Applications and Planning Meeting
Publisher: National Aeronautics and Space Administration
Volume: 3159
Issue Publication Date: January 1, 1992
Subject Category
Aircraft Communications And Navigation
Meeting Information
Meeting: 23rd Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting
Location: Pasadena, CA
Country: US
Start Date: December 3, 1991
End Date: December 5, 1991
Sponsors: United States Naval Observatory, Goddard Space Flight Center, Jet Propulsion Lab
Accession Number
92N33355
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.

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IDRelationTitle19920024106Work23rd Annual Time and Time Precise Interval (PTTI) Applications and Planning Meeting
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