新一代的全球卫星定位系统研究-精准定位系统

ANovelReal-TimePrecisePositioningServiceSystem:GlobalPrecisePositioningWithRegionalAugmentationNetworkReal-TimeKinematic(NRTK)Usingalocal/regionalreferencenetworkOBS.DOMAINRepresentationNRTKServiceCoversTheWholeChineseTerritory?GlobalPrecisePointPositioningServiceUsingaglobalreferencenetworkSTATEDOMAINRepresentationInitialization/Re-initializationtakes10-30Min..GlobalPPP+RegionalAugmentationForAllReal-TimeApplications

Real-TimePositioningServicesEPOS-RTSoftwareGlobalRT-PPPServiceRegionalAugmentationTheNovelSystemContentsEPOS-RTSoftwareMotivationStructureProgressEPOS-RT:MotivationRequirementof:NewIGSProductsMulti-System,Multi-TechnologiesLEOs,GEOs,HugeNetworksIGSReal-TimePilotProjectGFZOngoingProjects

Decision:Multi-Technology:GNSSSLRVLBI…Multi-Function:Real-time/Post-mission;Static/Kinematic/DynamicEPOS-RT:StructureLeftSide:Post-Processing.RightSide:Real-TimeEPOS-RT:ProgressSinceSept.2007AlreadyAvailableGPS/GLONASSReal-TimeClockEstimationGPS/GLONASS/LEOPOD(Cuietal,EGU2011,Presentation)RegionalAugmentation/NRTK(Lietal,EGU2011,Poster)Real-TimeZTD(Benderetal,EGU2011,Presentation)EmbeddableUserSoftwareFurtherComingGALILEO/COMPASSSLRIONO.ModelGFZGlobalRT-PPPServiceHardwareSoftwareIGSReal-TimeAnalysisCentreAtGFZNewDevelopmentinPPPPPPAmbiguityResolutionDataGapConnectionReal-TimePPPService(Hardware)GNSSreferencestationsGNSS-satellitesEPOS-RTGenerationofcorrectioninformationOrbit,clock,iono.UPDInternetconnectionUserterminalwithGNSSreceiverandcommunicationunitandPPPsoftwareINTERNETCasterGeostationarySatelliteCorrectionDataStreamCorrectiondatastreamGNSSobservationsEPOS-RTForReal-TimePPPServiceRTOrbitRTClockRTPPPGPSreceiversSRIF(Orb)BNCBNC2SRIFSRIF(Clk)‏SRIF2BNSBNC2SRIFSRIF(PPP)‏InternetconnectionControlUnitIGSHourlyDataRTPPPGPSreceiversBNC2SRIFSRIF(PPP)‏OBSStreamingNTRIPProductsNTRIPProductsORB/CLK/UPDHourlyDataRTORBPos&TimeZTD/STDControlUnitIGSReal-TimeAnalysisCenteratGFZStandardPPPServerStandardPPPClientGFZ

Real-TimeClock(Valid)IGSRTPPPOnlineValidation:http://igs.bkg.bund.de/ntrip/pppPPPAmbiguityFixingToShortenConvergence&ToImprovePositionAccuracyUncalibratedPhaseDelay(UPD)DataGapHandlingToAvoidRe-InitializationTemporalStabilityofAtmo.DelaysNewDevelopmentinPPPUPDGenerationForPPPAMBUPDGenerationForPPPAMBPPP+AMBFIX:1-2cminHorizontal,3-4cminVertical.InitializationTime15-20Min.ImpactSummaryLong(Re)ConvergenceIntegerAmbiguityFixingIntegerAmbiguityFixingDataGapHandlingExpectedNRTKPerformanceRegionalAugmentationSystemConfigurationBiasRepresentationUsingUnDifferencedObs.CorrectionsRealizationofUD-CorrectionsExperimentalValidationPrincipal:UnambiguousOMCOMCofStationktoSatelliteiUnambiguousOMC(AmbiguityKnown)CorrectedObs.Equ==PPPWithIntegerSD-AmbiguitiesHowToGetTheIntegerUD-AmbiguitiesForL1&L2?Principal:UnambiguousOMCInterpolatedUserCorrectionInterpolatedCorrectionUserObs.Equ.Cor.Obs.Equ.“Consistent”Int.UDAmb.InsteadofTheTrueConsistent=="Int.DDAmb.Constrained”TwoWays(AmbiguityMapping):WithoutPreciseSat.Clocks---NewNRTK(BasedOnFixedDD-ambiguities)WithPreciseSat.Clocks---PPPAugmentation,(BasedOnFixedUD/SD-ambiguities)NetworkSolutionNotAMUSTThereisnolimitationontheNumberofReferenceStationsIntegerUDAmbiguitiesGenerationOfAugmentationInfo.PPP+RegionalAugmentationClientNewNRTK:DataProcessingRECEIVERDatafromRegionalReferenceNetworkDataProcessingforAmbiguity-fixing(PPPMode)WithReg.Info.Accuracy:<2cmInitialization:DF<2minSF<10minPPP+AMBFIXOrbits&Clocks,UPDsfromGlobalRTPPPServiceFixedDD-ambiguitiesOMCwrtOrbits&ClocksAmbiguityMappingCASTERComputationofUnambiguousOMCsDataProcessingforAmbiguity-fixing(BaselineMode)BRD-(orUltraRapid)Orbits&ClocksValidationSAPOS:SimulatedRTDATA(Map:www.sapos.de)SAPOSDataof290stationsVariousreceivertypes30secondssamplingrateReferenceNetworkSelected22referencestationsInter-stationdistance184kmOthersareuserstationsSoftwareEPOS-RTLw+L1canbefixedwith1epochdata,Onaverage1.6epochs,halfofLw(3epochs)LW+L1+ION.PARcanfurthermorereducethefixingtimebutslightly.Improvementfoundforcaseswherelongfixingtimeneeded.Results:FixingTime(Lw+L1)Lw+L18,6and21mminENU,thesameasL17,6,and20mmLw+L1+ION,slightlyworsethanLw+L1,butfixingisimprovedResults:PositionAccuracyAccuracyofthePositionsatthefirstfixedepochUsingLw+L1Validation(CORS):RealTimeDATAARegionalCORSNetwork.with70stationsStreamDataof1HzReferenceNetworkSelected13referencestationsInter-stationdistance150kmUserstationsSoftwareNewlyDevelopedatGFZinC++ARegionalCORSNetNetworkEveryMinuteResetFilter90%FixedWith1Epoch,Onaverage3sLw,18,14and34mmENULw+L1indevelopmentValidation:Real-TimeResultsSummaryofAugmentationUD-OMCBasedOn“IntegerUDAmbiguity”CastedStation-By-StationInstantaneousAmbiguityFixingAchievableNetworkSolutionNotAMUSTAugmentedPPPToReplaceNRTKGlobalPPPWithRegionalAugmentationSystemConfigurationRegionalAugmentationPPPClientsAugmentationofPPPServiceGlobalRef.NetworkIONOSORBITCLOCKCASTERRegionalRef.NetworkObs.Residuals/OMCCASTERGlobalInfoORBIT,CLOCKIONOSRegionalInfoObs.correctionsWithoutReg.Info.Accuracy:DF<10cmSF<40cmInitialization:<20minWithReg.Info.Accuracy:<2cmInitializat