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1、外文资料及译文外文资料及译文1.外文资料全球定位系统第一节TheprincipleofGPS一、GPSGPS(NavigationSatelliteTimingandRanging/GlobalPositionSystem)，GPSclockanddistancenavigationsystem/globalpositioningsystems,referredtoasglobalpositioningsystem(GPS),alongwiththerapiddevelopmentofmodernscienceandtechnology,andsetupa
2、newgenerationofsatellitenavigationandpositioningsystemprecision.Globalpositioningsystem(GPS)isin1973byU.S.defenseforcesbegantoorganize,andcommonbasiccompletionin1993.Thissystemconsistsofspaceconstellation,groundcontrolanduserreceiveriscomposedofthreeparts.图1-1GPSSatellitedistribut
3、ion（一）Globalpositioningsystem1.1SpaceconstellationGPSspaceby24workingpartconstellationsparesatelliteandthreesatellite.Workin6orbitsatellitedistributionwithinthesurface.Eachtracksurfacedistributionhas3~4satellite,satelliteorbitsearth'sequatorAnglerelativetotheaverageheightof55,orbi
4、tfor20200kilometers.Satelliteoperatingcyclefor11hours45minutes.Therefore,inthesamestationdailysatellitelayoutisroughlysame,justfourminuteseverydayinadvance.Eachsatelliteabout5hourseverydayinthehorizon,locatedabovethehorizonofthesatellitenumberwithmoretimeandplace,atleast4November,
5、most.Thislayoutcanguaranteeonearthatanytime,anyplacecanalsoobservedabovefoursatellites.外文资料及译文Satellitesignaltransmissionandreceptionandtheinfluence,sotheGPSisaglobal,all-weatherreal-timenavigationandpositioningforsystem.Afterthecompletionoftheglobalpositioningsystem,itsworkinthes
6、pacedistributionofsatellite1-1asshown.GPSsatellitezipsareinstalledonthelight,microprocessors,messagesignalemissionequipment,storage,andprovidepowersupplybysolarcellshavelittlefuel,satelliteisusedtoregulatethesatelliteorbitandposture,andinthemonitorofinstruction,startsparesatellite
7、.1.2 ThegroundmonitoringsystemGPSgroundmonitoringsystemintheworldbyfivesites.Onemasterstation,3injectionstation.Fivemonitorareequippedwithautomaticacquisition,datacenter,double-frequencyGPSreceiver,precisionclock,environmentaldatasensorsandcomputingdevices,andtomasterstationprov
8、idesallkindsofobservationdata.Mas
