Geodesy Relative Resource
- GPS World Magazine
- International Earth Rotation Service
- International GPS Service for Geodynamics
- John Beadles's Introduction to GPS Appilications
- Paul Tarr's Reference Links to GPS General Information Sources
- Southern California Integrated GPS Network
- University NAVSTAR Consortium
- U.S. National Earth Orientation Service
- U.S. National Geodetic.Survey
- U.S. Naval Observatory Navstar GPS Operations
- ACCQPOINT
- Ashtech Inc
- Canadian Marconi Company
- Datum Inc
- Etak, Inc
- ETE, Inc
- Horizons Technology, Inc
- PCI Enterprises Inc
- RESON, Inc
- Rockwell International Corp
- Siemens Automotive
- Sony Corporation of America
- Trilithic, Inc
- Trimble Navigation Limited
- Geodetic Society of ROC
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