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1、摘要隨著科技的進(jìn)步及城市測(cè)量基準(zhǔn)的發(fā)展，高分辨率、高精度的城市級(jí)似大地水準(zhǔn)面已成為現(xiàn)代測(cè)繪發(fā)展，尤其是信息化城市所必需的基本條件。利用GPS定位技術(shù)以及現(xiàn)代地球重力場(chǎng)的確定理論和方法，來建立好精度、高分辨率的區(qū)域似大地水準(zhǔn)面，具有特別重大的科學(xué)意義、社會(huì)意義和經(jīng)濟(jì)效益。本文首先系統(tǒng)地介紹了GPS水準(zhǔn)擬合法在確定似大地水準(zhǔn)面中的應(yīng)用，將常規(guī)的幾何擬合法分為函數(shù)模型法、統(tǒng)計(jì)模型法、綜合模型法三大類，詳細(xì)介紹了他們的原理與特點(diǎn)，在此基礎(chǔ)上介紹了GPS水準(zhǔn)數(shù)據(jù)結(jié)合地球重力場(chǎng)模型和地形改正模型，采用移去一擬合一恢復(fù)法精化大地水準(zhǔn)
2、面的理論與實(shí)施步驟。文章最后重點(diǎn)研究了以我國(guó)新一代似大地水準(zhǔn)面CQG2000為平臺(tái)，結(jié)合GPS水準(zhǔn)數(shù)據(jù)精化區(qū)域似大地水準(zhǔn)面的理論與方法。將其作為一個(gè)平臺(tái)，結(jié)合部分高精度GPS水準(zhǔn)數(shù)據(jù)，借鑒移去恢復(fù)法原理提高區(qū)域(似)大地水準(zhǔn)面的計(jì)算精度。此外，本文給出了具體思想和計(jì)算步驟，并對(duì)移去恢復(fù)方法的可行性和優(yōu)越性作了分析和探討，并研究了GPS水準(zhǔn)點(diǎn)個(gè)數(shù)和間距對(duì)精化結(jié)果的影響。關(guān)鍵詞：似大地水準(zhǔn)面；GPS水準(zhǔn)；移去-恢復(fù)技術(shù)；CQG200048ABSTRACTWiththeprogressofscienceandtechnolo
3、gyandthedevelopmentofcitymeasurementdatum,highresolutionandhighprecisionlevelcitylikethegeoidhasbecomeamodernsurveyingandmappingdevelopment,especiallytheinformationnecessarytothecityfundamentalconditions.UsingGPStechnologyandmoderndeterminationoftheplanet'sgravi
4、tationalfieldtheoryandmethod,tobuildgoodprecision,highresolutionareaslikethegeoid,havespecialmajorscientificsignificance,socialsignificanceandeconomicbenefits.ThispaperfirstintroducesGPStodeterminetheleveloflegalinlikethegeoid,theapplicationoftheconventionalgeom
5、etricintendstolegaldividedintofunctionmodelmethod,statisticalmodelmethod,integratedmodelmethodthreecategories,detailedintroducestheirprincipleandfeaturesareintroducedinthispaperwithGPSlevelingdataearthgravityfieldmodelandtopographiccorrectionmodel,amovetoaunityt
6、orefininggeoidrecoveryactthetheoryandimplementationprocedures.Finally,inourcountrymainlystudiedanewgenerationlikethegeoidCQG2000astheplatform,combinedwithGPSlevelingdatarefinethearealikegeoidtheoryandmethod.Willitasaplatform,combinedwithhighlevelofGPSdata,fromth
7、erecoveryacttoremovetheprincipletoimproveregional(like)geoidcalculationaccuracy.Inaddition,thispapergivesthespecificideasandcalculationsteps,andtoremovethefeasibilityandadvantageofrecoverymethodisanalyzedanddiscussed,andtheGPSlevelingpointnumberandthespacingtore
8、finetheaffecttheresult.48Keywords：Likethegeoid;GPSlevel;Remove-recoverytechnology；CQG200048目錄第一章緒論11.1引言11.1.1大地水準(zhǔn)面似大地水準(zhǔn)面11.1.2研究的目的及意義11.2國(guó)內(nèi)外研究的現(xiàn)狀31.2.1國(guó)外研究現(xiàn)狀31.2.2國(guó)
