基于SST地球重力场模型的GPS高程转换研究及应用

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1、西南交通大学硕士学位论文基于SST地球重力场模型的GPS高程转换研究及应用姓名：龙小林申请学位级别：硕士专业：大地测量学与测量工程指导教师：范东明20090501西南交通大学硕士研究生学位论文第1l页AbstractAstheappearanceofGPShasgreatimpacttotheconventionaltechnologysurveying，geometrylevelinghasnoexception．Firstofall，evenontheprecision，thechallengeofGPSis

2、obviousinefficiency，economy，real—timecharacter．Ifnormalheightisnotnecessaryforsomecases，GPSlevelingcanreplacegeometrylevelingtosolvetheproblemsofengineeringorscientificresearch．Secondly，iftheabnormalheighthasbeencomputedbyquasi—geoid，geodeticheightcomputedfro

3、mGPSsurveyingcanbeentranslatedintonormalheight．Themethodisanalternativeforleveling．Withthegravityofthedevelopmentofsatellitetechnology,inparticularaseriesofhigh-precisionsatellitetrackingsatellite(satellite—to-satellitetracking，SST)EarthGravityModelforthedeve

4、lopmentofGPSheighttransformationprovidesagoodreferencedatum,suchastherecentreleaseofhigh-precisionEarthGravityModelofEGM2008，theorderof2190tomeetbands，spatialresolutionofabout9km．However’theGPSmeasurementofgeodeticheighti11t0anormalhightherearestillanumberofw

5、aysandmanyofthepreferredEarthGravityModeloptimizationproblem．Thispaperisaimedatthecontentofthesetwoareashavedoneamoredetaileddiscussionandanalysis．ThisthesisintroducedthebasictheoryofGPSheighttransformation，whichintroducedanumberofconventionalpuremathematical

6、functionsfittingtheheightofGPS，anddescribesonlytheuseofSSTEarthGravityModelonthebasicprinciplesofGPSheighttransformation．InintroducingtheEarthGravityModel，theEuropeanlarge—scaleregionalandaspecifictunnelprojectforanexample，doalotofcomparativeanalysisofEarthGr

7、avityModel．Gravi—tationalmethodsandNumericalFittingmethods，Inviewofthemeritsanddemeritsofthemarecomplementaryforeachother,AccordingtothefactthattheprecisionofGPSheighttransformationislowbysimplegeometrymethodinareasofrugged西南交通大学硕士研究生学位论文第1

8、l页topography,aGPSh

9、eighttransformmethodbyRemove·-Interpolate··RestoreideawithEGM、localtopographiccorrectionandgeometrymethodispresented，andlightofthespecificexampleofatunnelprojectaleanalyzedandcomparedthea