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1、Xx大学本科毕业设计（论文）外文翻译课题名称：学院（系）：xx学院年级专业：电子信息工程学生姓名：xxx指导教师：xxx完成日期：2011-06-14外文翻译原文SummarizingTheGlobalPositioningSystemAbstract:GlobalPositioningSystemisbasedonthebackgroundoftheUnitedStatesDepartmentofDefense.Itisdesigne,invested,developed,andoperatedbytheUnit
2、edStatesDepartmentofDefense,GPSisasatellite-basedpositioningandtimetransfering,GPSpositioningfunctionhasawiderangeofapplicationsinthemodernmeasurementandamoremodernbuilding.GPS-RTKtechnologyisalsowidelyusedinmodernizationbuilding,andnowGPShasalsobeenshowntobea
3、nimportantciviliancommunitiesofinterest,andincreasinglywiderangeofapplicated.Keyword:GPS,Locating，RTK，Layout，Survey1.BackgroundThe50s,theformerU.S.S.Rhasnotlaunchedhumanitiesfirstartificialearthsatellite,theAmericanscientistsinalongitstrackresearchin,haddiscov
4、eredtheDopplershiftphenomenon,andhasfacilitatedDopplersatellitenavigationpositioningsystemcompletingusingthisprinciple,hasobtainedtheenormoussuccessinthemilitaryandthecivilaspect,wasinanavigationlocalizationhistoryleap,ourcountryoncehasalsointroducedmanyDopple
5、rreceiver,appliedtotheislandassociationmeasured,theEarthexploredandsoontheappliedtotheislandassociationmeasured,theEarthexploredandsoonthedomain.ButbecauseDopplersatelliteorbithighlylow,signal-carrierfrequencylow,thetrackprecisionenhanceswithdifficulty,causest
6、hepointingaccuracylowly,satisfiesthegeodeticsurveyortheprojectsurveyrequest,ismoreimpossibletouseintheastronomyEarthdynamicsresearch.Inordertoenhancethesatellitepositioningtheprecision,USstartedfrom1973toprepareforconstructionglobalpositioningsystemGPS(GlobalP
7、ositioningSystem).Afterhasenteredtheplanproof,thesystemteststage,startedin1989tolaunchtheofficialworksatellite,andcompletelycompletedin1994,investmentuse.TheGPSsystemspaceiscomposedbytwentyonesatellites,evenlydistributesinsixorbit,thegroundlevelis20,000Kilomet
8、ers,theinclinationoforbitis55,theflatheartrateapproximatelyis0,theweekcontractis12hours,thesatellitetotheearthlaunchingtwowavebandsintelligencesignals,theintelligencesignalfrequenc
