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《JOURNAL OF TONGJI UNIVERSITY》 1996-04
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GPS Normal Height Calculation Model of Railway Aerial Picture Control Points

Shen Yunzhong;Liu Dajie;Zhou Quanji;Li Wenquan(Department of Surveying, Tougji University,Shanghai,200092)(Third Survey and Design Institute of RailWay Ministry, Tianjin, 3000251)  
In this paper the physical meaning of the fitting parameters in GPS normal height calculation model is first theoretically explained, and the precision reached by the common calculation model is demonstrated. Then the normal height calculation model of GPS points in railway aerophotogrammotric survey is put forward and its test results are analysed. The theoretical analysis and test results fully show that the precision of the GPS normal height obtained through the intorpolation from the results of railway base levelling can meet the requirement of aerophotogrammetric map with the scale less than 1: 2000.Therefore, the field work can ho greatly saved.
【Fund】: 铁道部第三勘测设计院资助
【CateGory Index】: U212.2
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【References】
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【Co-references】
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1 ZHANG Xing fu, SHEN Yun zhong, ZHOU Quan ji;The Estimate Method of the Accuracy Of GPS Height Abnormity Interpolation[J];测绘通报;2003-08
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1 DAI Hong-bao;XU Ji-ying;TANG Gu-cheng;School of Environment and Surveying Engineering,Suzhou University;School of Resources and Civil Engineering,Suzhou University;;Application of GPS Elevation Fitting in Highway Survey——A Case Study of the X026 Reconstruction[J];湖北第二师范学院学报;2017-02
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