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	Home : Earth Science : Geology : Mapping : Global Positioning System LINKS: GPS Errors & Estimating Your Receiver's Accuracy Learn to determine your handheld GPS accuracy and precision. http://www.cnde.iastate.edu/staff/swormley/gps/check_sa.html (Added: Sun Feb 16 2003) NOVA Online | GPS: The New Navigation Description of the GPS system. http://www.pbs.org/wgbh/nova/shackleton/navigate/gps.html (Added: Sun Feb 16 2003) The Global Positioning System Information about GPS - theory and applications. http://www.colorado.Edu/geography/gcraft/notes/gps/gps_f.html (Added: Sun Feb 16 2003) Trimble - All About GPS Learn abou GPS from one of the leading manufacturers of GPS equipment. http://www.trimble.com/gps/index.html (Added: Sun Feb 16 2003)
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