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NAVSTAR GPSNavigational, Strategic, Tactical & Relay - Global Positioning System
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differential GPS Calculation of location based on NAVSTAR GPS
Several systems were developed and tried before the Navigation Signal Timing and Ranging Global Positioning System (NAVSTAR GPS) was put into place.
NAVSTAR GPS is a dual-use system consisting of a constellation of 24 satellites, plus spares, orbiting at an altitude of approximately 12,600 miles.
(Anaheim, CA), a wholly owned subsidiary of L-3 Communications Corp., has developed the SCS 2400 NAVSTAR GPS Satellite Constellation Simulator test system for evaluating GPS-based systems.
However, the author acquired all of the available unclassified information from the Interface Control Document of the Navstar GPS (ICD-GPS-200), which was requested via electronic mail from the United States Coast Guard's Navigation Center at
Satellite Imagery FAQ Microsoft's USGS Terraserver NAVSTAR GPS Homepage The Aerospace Corporations GPS Primer Operational Significant Events Imagery Homepage Intellicast Weather The Weather Underground Current Satellite Photos Street Atlas Product Software Atlas Product Software for Garmen GPS Products Garmen GPS Products Steve Portz teaches technology at Space coast Middle School, Cocoa, Florida.
As GPS signals pass through the atmosphere, they are refracted, adding an additional apparent distance (phase) between the transmitting Navstar GPS satellite and a receiver on board the low-earth-orbiting (LEO) satellite, MicroLab-1.