【测绘】测绘信息与工程

[7],.GPS[J].,2001(7):29231[8],.GPS[J].,2005(4):628[9],,.GPS[J].,2002,31(2):1282133:2006211215:,,E2mail:[e-mail]WOCOMBINEDMODELINGPSLEVELINGZHONGBo1LUOZhicai1,2HUXu3(1SchoolofGeodesyandGeomatics;2TheKeyLaboratoryofGeospaceEnvironmentandGeodesy,MinistryofEducation,WuhanUniversity,129LuoyuRoad,Wuhan430079,China;3TangguDistrictLandSurveyingandMappingInstituteofTianjinCity,6ShandongRoad,Tianjin300450,China)ABSTRACTTwocombinedmodelswhichareweightedcombiningmodelandhybridfittingmodelinGPSlevelingarediscussed.Thenweemploythetwocombinedmodelsandsomesinglemodels,suchasconicoidmodel,polyhedralfunctionmodel,shepardcurvedsurfacemodelareusedinapproximatingheightanomalyinatestarea.Theresultsindicatethattheprecisionandreliabilityinapproximatingheightanomalybycombinedmodelsarebetterthananysinglemodelthatarereferredabove,andthehybridfittingmodelismorereasonablythanweightedcombi2ningmodelintheory.KEYWORDSGPSleveling;heightanomaly;curvedsurfacefitting;combinedmodel:100723817(2007)0220016203:P228:BVRS(,57,215021)VRSGPS,()EGM96,,VRS;GPS;();;EGM96,,,RTK,2003GPS,GPS,,[1]GPS20056,12,20066,1GPS,7GPS1Trimble5700NetRS,70km,30km,52kmSDH,MSTP,1GPS,61JournalofGeomaticsApr.2007;32(2),VRS2.5GPS2NET,VRS,,,2,GPRSCDMA,,GPRS,CDMA384bit/s,,2004GPS,GAMIT2,GPSTG2PPS,GAMIT,WGS2848700km2;;,GIS,2()1)()[2]GPS/GPS,,,,GPS/,,,,GPS,,,,GPS/,,2)EGM96()[3]EGM96,,,,,,30mmGPS,,EGM96,GPS:e=H-N(EGM96),e,H,N(EGM96)EGM9631)RTKTrim2ble5800Trimble5700X90S82,288km27,RTK,,2002(),2005RTKVRS2RTK11RTKVRS2RTKX/mY/mZ/mX/mY/mZ/mX/mY/mZ/m010.023-0.012-0.0190.0130.0110.0160.0070.0280.020020.0210.004-0.0280.0160.0210.0260.0220.0250.018030.020-0.041-0.0740.0180.0220.0270.0120.0250.016040.041-0.042-0.0240.0390.0170.0220.0140.0450.017050.050-0.062-0.0460.072-0.009-0.0510.0020.0550.015060.0160.0130.0320.021-0.011-0.0530.0010.0210.029070.0150.0290.0470.0050.004-0.0020.0310.0200.014,RTK22RTKMx/mMy/mMz/mM/mTrimble5800/57000.0290.0350.0420/70.062.X900.0340.0150.0330/70.049.S820.0160.0340.0190/70.042Mx=[XX]/n1/2My=[YY]/n1/2Mz=[ZZ]/n1/2,XYZRTK;n;MxMyMz12:,,VRS,,71JournalofGeomaticsApr.2007;32(2)2)RTK,EGM96,GPS/,7:X2Y2Z2=(1+m)1z-y-z1xy-x1X1Y1Z1+X0Y0Z0,X0Y0Z03,xyz3,mTrimble5700,8,RTKVRS2RTK33,,8,3VRS2RTK/mVRS2RTK/m/cmXYZXYZXYZF3297.2399.5383.3057.2689.4613.234-2.77.77.1F3458.1056.6702.0728.1586.6332.161-5.33.7-8.9F3861.3159.3762.2931.3809.4082.348-6.5-3.2-5.5I2996.1502.9976.2143.047-6.4-5.0F4655.2410.3102.0375.2750.3162.107-3.4-0.6-7.0F4534.4995.5302.3004.5285.5682.335-2.9-3.6-3.5F4006.4289.4442.8626.4799.4012.888-5.14.32.6F2351.3062.2271.3951.3542.1831.439-4.84.44.4,,GPS,,,,,,GPS,,,,,,,VRS/EGM96,4GPS,,(),,,,ù[1].GPS[R].:,2004[2],,.[M].:,2001[3],,.EGM96GPS[J].,2006(3):22223[4],.GPS[J].,2004,29(6):34235[5],,.[J].,2005,30(3):42244:2006212214:,,GPSE2mail:[e-mail]3DGEODETICDATUMINSUZHOUCITYBASEDONVRSSYSTEMCHENZhongxinTANGWengangFANZhanyongXIChangyuan(SurveyingCenterofSuzhouIndustrialPark,57ZhongxinRoad,Suzhou215021,China)ABSTRACTTheprocessofestablishinguninterruptedGPSreferencesystemisintroduced.Thepreciseanddynamic3Ddatamissetupbycombiningrefinedquasi2geoidandEGM96.KEYWORDSVRS;GPSbasestation;levelsurfacerefinement;citystandardofgeodetic;EGM96,,,,,,81JournalofGeomaticsApr.2007;32(2)