Transcription of Introduction to Global Positioning Systems (GPS)
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1 Prepared for USDAI ntroduction toGlobal Positioning Systems (GPS)Maryland NRCSA ugust 20072 Topics GPS function & terminology GPS applications in NRCS Garmin GPS 76 for Data Collection3 NAVSTAR Navigational Satellite Timing And RangingI. What is GPS? Precisely identify locations on earth by measuring distances from the satellitesGPS is a Positioning system based on a network of satellites that continuously transmit coded information. The information transmitted from the satellites can be interpreted by receivers to precisely identify locations on earth by measuring distances from the is funded by and controlled by the Department of Defense (DOD).
Differential Global Positioning Systems • DGPS improves the accuracy and integrity of standard GPS • DGPS works by placing a GPS receiver at a known location, this is called a reference station • The reference station knows its exact location, and therefore can calculate the difference between the GPS derived positions and the true position.
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