GPS精密卫星钟差估计与分析

34120091GeomaticsandInformationScienceofWuhanUniversityVol.34No.1Jan.2009:2008211210:973(2006CB701301);863(2006AA12A109);(200807):167128860(2009)0120088204:AGPS1121(1,129,430079)(2,16,100039):GPS,PAN2DA,40IGS,GPS,PANDAGPSIGS,0.2ns,IGS:;PANDA;:P228.41GPS,,,,GPSIGS,SIO6,0.10.2nsIGS6,0.1ns[1],,10-7s,35ns[3][4],12ns1,,:vjk,=tk-tj+jk/C+jk,trop/C+Njk/C+jk,-jk/C(1)vjk,p=tk-tj+jk/C+jk,trop/C+jk,p-Pjk/C(2),k;j;C;tk;tj;jk,trop;jk,p(i)jk,(i);Pjk(i)jk(i);;jkGPS,,,(),10-6s,,,[3],,GPS,GPS,,,,(1),341:GPS,,,,,,,,,,(2)(1):vjk,p=Njk/C-Pjk/C-jk/C+(jk,p+jk,)(3),(1)(3)(3),(1),,,,,,2,40IGS(1)2006197203d,PANDA[5],GPSIGS,5min,1IGS,(1),IGS,,IGS,IGSIGS,RMS1RMS2:RMS1=ni=1iinRMS2=ni=1(i-Š)(i-Š)n(4),i,Š,201d,201d1GPSTab.1StrategyoftheGPSSatelliteClockEstimationLCPCP13.0m,L10.017p=1,e30,p=sin2e,e30IGS_01BlockI0.2110,0.0000,0.0854mBlockII/IIA0.2790,0.0000,1.2300mBlockIIR0.0000,0.0000,0.0000mALGOIGSIGSEOPIERSSaastamoine+,20cm+2cm/sqrt(h)+,30000m+,9000m140Fig.1Distributionofthe40StationsforGPSSatelliteClockEstimation9820091PANDAIGS,,2,RMS1RMS2,,2ns,,3,RMS1RMS2,RMS11ns,RMS20.2ns,,,(4),,,0.2ns,,,,,,,2IGSFig.2DifferencesofGPSClockResultsBasedonPseudorangefromIGSFinalPreciseClockProducts3IGSFig.3DifferencesofGPSClockResultsBasedonPhasefromIGSFinalPreciseClockProducts4IGSFig.4SystemicDifferencesofGPSClockResultsBasedonPseudorangeandPhase09341:GPSRMS1RMS24,RMS1,34,RMS2,()23,,,PANDAGPSIGS,12ns,PANDAIGS,,,,,,,,,,RMS231),,,GPS,,2),PANDAIGS0.2ns,IGSPANDAIGS12ns,:GFZ[1]IGS(2008).IGSProductAvailability[OL].http:igscb.jpl.nasa.gov,2008[2],,,.GPS[J].,2008,33(8):8152817[3],,,.GPS[M].:,1999[4].GPS[D].:,2002[5].GPS[D].:,2004[6]GeM,GendtG,DickG,etal.ANewDataPro2cessingStrategyforHugeGNSSGlobalNetworks[J].Geod,2006,80(4):1992203[7],.GPS[M].:,1998:,E2mail:[e-mail]sofGPSPreciseClockProductsLOUYidong1SHIChuang1ZHOUXiaoqing2YEShirong1(1ResearchCenterofGNSS,WuhanUniversity,129LuoyuRoad,Wuhan430079,China)(2ChineseAcademyofSurveyingandMapping,16BeitaipingRoad,Beijing100039,China)Abstract:ThemethodofGPSsatellitepreciseclockestimationisinvestigatedandthecontributionofpseudorangeandphasemeasurementsinGPSsatellitepreciseclockestimationisanalyzed.BasedonthePANDAsoftware,about40IGSstationsareusedtoestimatetheGPSpreciseclock.There2sultsindicatethatthedifferenceofthePANDAclockresultsfromtheIGSfinialpreciseclockprod2uctsisbetterthan0.2ns,whichisthesameaccuracylevelofallIGSanalysiscenters.Keywords:preciseclockproducts;PANDA;accuracyanalysisAboutthefirstauthor:LOUYidong,Ph.Dcandidate,majorsinrealtimesatelliteorbitdeterminationandpositioningtechnology.E2mail:[e-mail]19