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ephemeris x
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NGS - PRECISE GPS ORBITS COMPUTED AT THE NATIONAL GEODETIC SURVEY
The GPS precise orbits are derived using 24 hour data segments from the global GPS network coordinated by the International GPS Service (IGS). Provides links to coordinate transformation (geoid) computations and to the continuously operating [GPS] reference stations.Wed Mar 28 17:32:09 2007 - permalink -- http://www.ngs.noaa.gov/GPS/GPS.html