Web resources Global Positioning System Overview by Peter H. Dana http://www.colorado.edu/geography/gcraft/notes/gps/gpsfht THE INTERAGENCY GPS EXECUTTVE BOARD (IGEB) http://www.igeb.gov/ >GpsApplicationsExchange.http://gpshome.sscnasagov/ .TheInternationalGpsService(igs).http://igscb.iplnasagov/ U.S. Naval Observatory (USNO)GPS Operations http://tycho.usno.navymil/gps.html U.S. Coast Guard Navigation Center LlP.//www.navcen.uscg.govl 電 卫星定位技术与方法—袁林果 2005-2-25 Global Positioning System(GPS) >The NAVsTaR Global Positioning System(GPS)is a satellite-based radio-positioning and time-transfer system, designed, financed, deployed and operated by the US Department of Defense However, the system has currently significantly larger number of civilian users as compared to the military users 卫星定位技术与方法—袁林果 2005225(63 卫星定位技术与方法——袁林果 2005-2-25 5 Web Resources ¾ Global Positioning System Overview by Peter H. Dana. http://www.colorado.edu/geography/gcraft/notes/gps/gps_f.ht ml ¾ THE INTERAGENCY GPS EXECUTIVE BOARD (IGEB). http://www.igeb.gov/ ¾ GPS Applications Exchange. http://gpshome.ssc.nasa.gov/ ¾ The International GPS Service (IGS). http://igscb.jpl.nasa.gov/ ¾ U.S. Naval Observatory (USNO) GPS Operations http://tycho.usno.navy.mil/gps.html ¾ U.S. Coast Guard Navigation Center http://www.navcen.uscg.gov/ 卫星定位技术与方法——袁林果 2005-2-25 6 Global Positioning System (GPS) Global Positioning System (GPS) ¾The NAVSTAR Global Positioning System (GPS) is a satellite-based radio-positioning and time-transfer system, designed, financed, deployed and operated by the US Department of Defense. ¾However, the system has currently significantly larger number of civilian users as compared to the military users