單頻GPS精密單點(diǎn)定位研究.pdf

1、長(zhǎng)安大學(xué)碩士學(xué)位論文單頻GPS精密單點(diǎn)定位研究姓名：韋克申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：大地測(cè)量學(xué)與測(cè)量工程指導(dǎo)教師：劉萬(wàn)林20100604AbstractPrecisePointPositioningisahighprecisionGPSsinglepointpositioningtechnologyitonlyusesaGPSreceiver’Sobservations，combineddownloadedfromtheIGSstation

2、sprecisesatelliteephemerisandprecisesatelliteclockerrorfile，usingtheobservedreceivedpseudorangeandcarrierphaseobservationstocalculatetogetthereceiver’Sexactcoordinatesintheearthcoordinatesystem，thepositioningaccuracycanb

3、eachievedevencentimetersAccordingtotheobservingofreceiver，themethodhasadifferenceofdualfrequencyprecisepointpositioningandsingle—frequencyprecisepointpositioningInthesinglefrequencyprecisepointpositioning，youneedtogettot

4、heprecisesatelliteorbitandsatelliteclockerrorvalue，thenconsiderthethevarioussourcesoferrorimpactingonpositioningresultsandthecorrespondingcorrectionmodelingInthepost—processingitCallalsobecombinedwithIGSstations’Sprecise

5、ephemeristoobtainhigh—precisionsatelliteorbit，combinedwithIGSstations’SsatelliteclockerrorsfiletogeteffectivelyclockerrorcorrectionOthererrorsourceshavethecorrespondingcorrectionmodels，inwhichtheionospheredelayerroronthe

6、single—frequencysinglepointpositioningaccuracyisthemaximum，itshouldbecardedoutindepthstudyIncalculatingprocess，preprocessingworkisgrosserrorsdetection，cycleslipdetectionandrepairphase—smoothedpseudorangedataandthenthenex

7、tworkisestimatingtheunknownparametersusingtheKalmanfilterThesingle—frequencyprecisepointpositioningresearchworkofthispaperare：(1)introducedthesinglefrequencyprecisepointpositioningofthebasiccontent，includingtheestablishm

8、entofobservationequations，observations’combinedmethod，errorSOurCeSandcorrectionofmodel(2)TheimpactofionosphericdelayhasthegreatestimpactonthesinglefrequencyPPPthisarticlefocusesonintroducingavarietyofionosphericcorrectio

9、nmodels，theionosphericgridmodelinterpolationmethodsandtheestablishmentofasmallregionoftheionospheremodelfiringmethodsintroductionUsingcaseanalysis，gettingthatbyaddingtheunknownparametersofionosphericparametersCanachieveg

10、oodresults(3)discussedthesinglefrequencyprecisepointpositioning’Sthreemethodsofdetectingthecyclejump：pseudorange／carriercombinationmethod，thecarrierrateofchangeandthestarsintercroppingdifferencePolynomialCalculatedwithex