专业英语——GNSS介绍双语PPT

全球导航定位系统GNSS,GlobalNavigationSatelliteSystem,1,2,3,contents,ThebriefintroductionofGNSS,TheconstellationsofGNSS,TheapplicationofGNSS,1.ThebriefintroductionofGNSS,Itisconstellationofsatellitesdesignedtoprovidepositioningandtiminginformationforusersonearthorinspace.Itisreferstoalltheglobalandregionalsatellitenavigationsystemandtheenhancesystem.,ThecomponentofGNSS,GPS,GLONASS,Beidou,GNSS,GALILEO,1.ThebriefintroductionofGNSS,2.TheConstellationsofGNSS,2.1GPSBasicInformation24satellites6orbitalplanesonalmostcircularorbitsanaltitudeofabout20,200kmabovethesurfaceoftheearthinclinedby55withrespecttotheequatororbitalperiodsofapproximately11hours58minutesdesignedandrealizedbytheU.S.DepartmentofDefensethemilitaryapplication,commercialandpublicsectorusers,2.1GPSGPShasmadeaconsiderableimpactonalmostallpositioning,navigation,timingandmonitoringapplications.ItprovidesparticularlycodedsatellitesignalsthatcanbeprocessedinaGPSreceiver,allowingthereceivertoestimateposition,velocityandtime.Eg:placingGPSreceiversonoceanbuoystomeasurewaveheightanddirection,monitoringtheearthscrustaldeformations,andsensingtheatmosphereusingoccultationtechniques,suchasthoseaccomplishedusingCHAMPsatellite.,2.TheConstellationsofGNSS,2.2GLONASSBasicInformation24satellites(12October,19821995)In3orbitseparatedby64.8intheequatorialplaneAnaltitudeofabout19,130kmabovethegroundsurfaceAnorbitalperiodof11:15:14OperatedbytheMinistryofDefenseoftheRussianFederation.,2.TheConstellationsofGNSS,2.2GLONASSFutureThefutureseemeduncertainduetoeconomicproblemsfacingtheRussianFederationoverthepastfewyears.Thenumberofoperationalsatelliteswassteadilydecreasing.AsofJanuary2006,atotalof10satellitesareoperational.ButGLONASSwasrecoveredandrestoredin2011.Inrecentyears,uncertaintyaboutthefutureoftheGLONASSsystemhaslimitedthedemandandavailabilityofreceiverstoprocessthesignals.,2.TheConstellationsofGNSS,2.3GalileoBasicInformation30satellites3orbitalplanesonalmostcircularorbitsanaltitudeofabout23,222kmabovethesurfaceoftheearthinclinedby56withrespecttotheequatororbitalperiodsofapproximately13hoursdesignedandrealizedbyEuropeanUnion,2.TheConstellationsofGNSS,2.3GalileoItisEuropesinitiativeforastate-of-the-artglobalnavigationsatellitesystem,providingahighlyaccurate,guaranteedglobalpositioningserviceunderciviliancontrol.Itwillprovideautonomousnavigationandpositioningservice,butatthesametimewillbeinteroperablewiththetwootherglobalsatellitenavigationsystems:GPSandGLONASS.Byprovidingdualfrequenciesasstandard,Galileowilldeliverreal-timepositioningaccuracydowntothemeterrange.,2.TheConstellationsofGNSS,2.4BeiDou/CompassBasicInformation35satellites(5GEO+30MEO)In3orbitseparatedby55intheequatorialplaneAnorbitalperiodof12hours55minutesCreatedandoperatedbyChina,2.TheConstellationsofGNSS,2.4BeiDou/CompassTheBeiDouisChinasentryintotherealmofGNSS.ChinawillbuildBeiDoucoveringthewholeworldin2020.BeiDouwillsharemanyfeaturesincommonwithGPSandGalileo,providingthepotentialforlowcostintegrationofthesesignalsintoaGPS/Galileo/BeiDoureceiver.Thesecommonalitiesincludemultiplefrequencies,signalstructureandservices.,2.TheConstellationsofGNSS,TheapplicationofGNSS,1.Personalnavigation,2.Aviationapplication,3.Automotiveapplication,4.