| ȱʧ�����»���EM�㷨��GPS�߳���� |
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| 引用本文： | 林东方,宋迎春,杜琨,肖琴琴.ȱʧ�����»���EM�㷨��GPS�߳����[J].大地测量与地球动力学,2012,32(2):139-142. |
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| 作者姓名： | 林东方 宋迎春 杜琨 肖琴琴 |
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| 作者单位： | 中南大学地球科学与信息物理学院测绘与国土信息工程系,长沙,410083 |
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| 基金项目： | 国家自然科学基金，教育部博士点基金 |
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| 摘 要： | GPS????????????????????????????????????????????????????????????????????????ó??淽?????????????????????????????EM?????????????????????????????????????????????????????Ч????????????μ?GPS??????????
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| 关 键 词： | ?????? EM?? ?????? ????????? ??????????? |
GPS ELEVATION FITTING BASED ON EM ALGORITHM FOR LACK OF DATA |
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| Lin Dongfang
,
Song Yingchun
,
Du Kun
,
Xiao Qinqin.GPS ELEVATION FITTING BASED ON EM ALGORITHM FOR LACK OF DATA[J].Journal of Geodesy and Geodynamics,2012,32(2):139-142. |
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| Authors: | Lin Dongfang Song Yingchun Du Kun Xiao Qinqin |
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| Institution: | (School of Geosciences and Info-Physics,Central South University,Changsha 410083) |
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| Abstract: | Restricted by the observing conditions,some important data of GPS elevation fitting are often missed or not enough.Using conventional methods will reduce the fitting accuracy of the quasi-geoid.By use of the EM algorithm with the addition of "potential data",conditional expectation of the missing data,it can effectively improve the accuracy of GPS elevation fitting for lack of data. |
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| Keywords: | missing data EM algorithm elevation fitting related plane fitting quadratic surface fitting |
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