毕业论文外文文献翻译Summarizing-The-Global-Positioning-System全球定位系统概述Word文件下载.docx
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毕业论文外文文献翻译Summarizing-The-Global-Positioning-System全球定位系统概述Word文件下载.docx
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文献、资料中文题目:
全球定位系统概述
文献、资料英文题目:
Summarizing The Global Positioning
文献、资料来源:
System
文献、资料发表(出版)日期:
院(部):
专 业:
班 级:
姓 名:
学 号:
指导教师:
翻译日期:
2017.02.14
本科毕业设计(论文)中英文对照翻译
SummarizingTheGlobalPositioningSystem
Abstract:
GlobalPositioningSystemisbasedonthebackgroundoftheUnitedStatesDepartmentofDefense.Itisdesigned,invested,developed,andoperatedbytheUnitedStatesDepartmentofDefense,GPSisasatellite-basedpositioningandtimetransferingGPSpositioningfunctionhasawiderangeofapplicationsinthemodernmeasurementandamoremodernbuilding.GPS-RTKtechnologyisalsowidelyusedinmodernizationbuilding,andnowGPShasalsobeenshowntobeanimportantciviliancommunitiesofinterest,andincreasinglywiderangeofapplicated.
Keyword:
GPS,Locating,RTK,Layout,Survey
1.Background
The50s,theformerU.S.S.Rhasnotlaunchedhumanitiesfirstartificialearthsatellite,theAmericanscientistsinalongitstrackresearchin,haddiscoveredtheDopplershiftphenomenon,andhasfacilitatedDopplersatellitenavigationposi-tioning
systemcompletingusingthisprinciple,hasobtainedtheenormoussuccessinthemilitaryandtheciviaspect,wasinanavigationlocalizationhistoryleap,ourcountryoncehasalsointroducedmanyDopplerreceiver,appliedtotheislandassociationmeasured,theEarthexploredandsoontheappliedtotheislandassociationmeasured,theEarthexploredandsoonthedomain.ButbecauseDopplersatelliteorbithighlylow,signal-carrierfrequencylow,thetrackprecisionenhanceswithdifficulty,causesthepointingaccuracylowly,satisfiesthegeodeticsurveyortheprojectsurveyrequest,ismoreimpossibletouseintheastronomyEarthdynamicsresearch.Inordertoenhancethesatellitepositioningtheprecision,USstartedfrom1973toprepareforconstructionglobalpositioningsystemGPS(GlobalPositioningSystem).Afterhasenteredtheplanproof,thesystemteststage,startedin1989tolaunchtheofficialworksatellite,andcompletelycompletedin1994,investmentuse.TheGPSsystemspaceartiallyiscomposedbytwentyonesatellites,evenlydistributesinsixorbit,thegroundlevelis20,000Kilometers,theinclinationoforbitis55,theflatheartrateapproximatelyis0,theweekcontractis12hours,thesatellitetotheearthlaunchingtwowavebandsintelligencesignals,theintelligencesignalfrequencyrespectivelyis1575.442megacyclespersecond(theL2waveband),onthesatellitehasinstalledtheprecisionveryhighatomicclock,guaranteesthefrequencythestability,modulatesinthecarrierhastheexpressionsatellitepositionthebroadcaststarexperience,useintherangefinderC/AcodeandPyard,aswelladothersysteminformation,canintheglobalscope,towillfullymulti-userprovidethehighaccuracy,all-weather,iscontinual,real-timethreedimensionalmeasuresfast,thethreedimensionallocalizationandthetimeservice.
TheGPSsystemcontrolsectionbyislocatedintheAmericanfoundationsofthe
states5monitoringstationstobecomposed,thesestanddidnotaskbreaksCarriesontheobservationtoGPSsatellite,andwillcalculateandtheforecastinformationbytheinfusionstandsrenewstothesatelliteinformation.
TheGPSsystemuserisextremelycovert,itisonekindofone-waysystem,theuseronlyreceivesbutdoesnotneedthetransmittingmessage,andthereforeuser'
squantityalsoisnotlimited.AlthoughGPSistheunificationstartsis,butveryquantityalsoisnotlimited.AlthoughGPSreceiverandprocessingsoftwareemergeinabundance.AtpresentthereceiverwhichappearsintheChinesemarketmainlyhas
ROGUE,ASHTECH,TRIMBLE,LEICA,SOKKIA,TOPCONandsoon..Cancarryon
theobservationtotwofrequenciesthereceivertobecalledthedoublefrequencyreceiver,onlycancarryontheobservationtoafrequencythereceivertobecometheinference.Saysregardingthemappinguser,GPShascausedtherevolutionarychangeinthemappingdomain,atpresent,inthescopeseveralthousandkilometerscontrolsnetwork,intheprecisionfromhundredtothemillimeterlevellocalization,generallyallGPStookthefirstchoicemethod,isdaybydaymaturealongwiththeRTKtechnology,GPSstartedtodecimeterandevenacentimeterlevellayout,domainseepageandsoonhighaccuracydynamiclocalization.
TheinternationalGPSgeodeticsurveyservedIGSwithEarthdynamicsfrom1992,hasestablishedmanydatastorageandtheprocessingcenterinthewholeworld,yeartoyearobservedastationwithhundred,ourcountryhasalsosetupShanghaiYuShan,Wuhan,Xian,Taiwanandsoonmanyyeartoyearmeasuringplatformsstation,thesestationsobservationdatapassedoneverydaythroughtheinternetnettoUS'
Sdatastoragecenter,IGSalsonearlyreal-timesynthesizesvariousdataproc
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