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《Engineering of Surveying and Mapping》 2012-01
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The analysis of BP neural network fitting the quasigeoid

NIE Jian-liang,GUO Chun-xi,CHENG Chuan-lu,JIANG Guang-wei, WANG Bin,MA Xin-ying,WANG Wen-li (Geodetic Data Processing Center,National Administration of Surveying,Mapping and Geoinformation,Xi'an 710054,China)  
BP neural network is used to weaken the systematic errors in order to improve the accuracy of quasigeoid for the systematic errors in the data of GPS and level and the data of gravity quasigeoid may reduce the reliability.The deficiency for fitting the quasigeoid with BP neural network is discussed.Two sets of data in different areas are employed to test BP neural network.It is shown that BP neural network can factually approach the true quasigeoid,but have poor generalization ability out of control area.
【Fund】: 863计划资助项目(2009AA121402-5);陕测科(2009-03)
【CateGory Index】: P228.4
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