GPS Maps and GPS Tours for on- and off road sightseeing, including points of interest, routes, and tracks for use with handheld GPS, and car navigation systems, from Garmin, Magellan and others, including Windows Mobile devices.
America's official timekeeper, providing accurate spoken time based on the USNO Atomic Clock, GPS, Loran and Omega time information, U.S. time zone conversions, and other pertinent timekeeping information.
CORS provides Global Positioning System (GPS) carrier phase and code range measurements in support of 3-dimensional positioning activities throughout the United States and its territories.
www.ngs.noaa.gov/CORS/cors-data.html
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The Crustal Dynamics Data Information System (CDDIS) supports data archiving and distribution activities for the space geodesy and geodynamics community.
Global Positioning System satellite ephemerides ("orbits") information for the general public, from US NOAA. GPS precise orbits are derived using 24 hour data segments from the global GPS network. An informational summary file is provided...