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《Science of Surveying and Mapping》 2010-01
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Study on establishing local geomagnetic model using spherical cap harmonic analysis

ZHAO Jian-hu,WANG Sheng-ping,LIU Hui,LI Deng-fu(School of geodesy and Geomatics,Wuhan University,Wuhan 430079,China)  
Spherical cap harmonic analysis is analyzed and studied in building local or original geomagnetic model.In the procedure,some key problems,such as the quality control and representativeness of 3-component magnetic data,the choice of polar point and polar angular size,the determination of truncation order of local geomagnetic model,the analysis and influence of boundary effect of spherical cap harmonic analysis in building the local model,are studied in the paper.At the end of this paper,we uses the method for building 3-component geomagnetic model in a local sea area,we found we can acquire higher model accuracy in each sub area than in the whole area.
【Fund】: 国家863项目资助(编号2007AA12Z326)
【CateGory Index】: P738.3
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