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《Science of Surveying and Mapping》 2008-S1
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Doppler reduction technique for determining the orthometric height using GPS signals

SHEN Wen-bin~(①②) FENG Li~①WANG Ze-min~①CHAO Ding-bo~(①②)①The Department of Geophysics,School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;②The Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,Wuhan University,Wuhan 430079,China  
Based on the gravity frequency equation,the frequency shift between two arbitrary points on ground could be deter- mined using two receivers by receiving the GPS signals.Then,the geopotential difference as well as the related othometric heist differ- ence between these two points could be determined.In the frequency shift measurement,the classic Doppler effect is the most signifi- cant error source.In this paper,various error sources are discussed,and especially,an approach,referred to as the Doppler reduction approach,for reducing the influence of the Doppler effect is investigated.Using this approach,the accuracy of measuring the gravity frequency shift could be largely improved.
【Fund】: 国家863项目(编号:2006AA12Z211)
【CateGory Index】: P228
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