GPS-GLONASS-北斗-Galileo-四大卫星导航系统-竞风流-

10GlobalPositioningSystemGPSGlobalNavigationSatelliteSystemGLONASSGalileoPositioningSystemGalileoGPSGLONASSGalileoGLONASSGPSGalileoGPSTransitSatelliteNavigationSystemTransit19581964,1967Transit5613TransitGPS2070GPS20300199498%24GPSGPS2421324645560130431MasterControlStation4GroundAntenna6MonitorStation5(GEO)5(IGSO)5+5+44MEO2MEO12201216MEO2150012224GEOIGSOMEO332MEOGPSGLONASS11GPS42GPS6GPSGPSGPSGPSGPS4GPS98%GPS50km10-6m100km500km10-7m1000km10-9m20km15min~20min15km1min~2min30%50%GPSGLONASSGLONASS1976GPSGPSGLONASSGLONASSGPS199530GLONASS19821212GLONASS19952001~201010242012GLONASS301mGPSGLONASS3GLONASS27327331208452.36km56GLONASSGLONASSGPSGLONASSC3IGalileoGPS12GalileoGPSGLONASSGalileoGalileoGPSGLONASSGalileoGalileoGalileoGalileoGPSGLONASS1GalileoGPSGalileoGPS10mGalileo1mGLONASS-MGLONASS-KGLONASSGLONASSGLONASS/GPSGalileo20142019Galileo2002315GalileoGalileo3330MEO109156GLONASSGLONASSGPSGPSCDMAGLONASSFDMAGLONASSGPSWGS-84GLONASSPE-90GPSGLONASSGLONASSGLONASS2004GLONASS-M4GPSGALILEOGLONASS5GEO+(24-30)MEO(24-30)MEO30MEO24MEO(km)GEOMEO21500MEO20230MEO23222MEO1910036(3)3355555464.812H55M11H58M13H11H15M2000WGS-84WGS-84PZ-90BDTGPSTGPSTGEONASST(MHz)B1:1561.098B2:1207.140L1:1575.42L2:1227.6L5:1176.45L1:1575.42E5b:1207.140E5a:1176.45L1:1602.5625-1615.5L2:1240-1260CDMACDMACDMAFDMA(mbps)2.0461.0231.0230.0511QPSK+BOCQPSK+BOCBPSK+BOCBPSK(bps)505005050100050