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中文摘要：
利用常规的Kriging法进行GPS高程拟合时,由于模型误差和公共点误差的存在,其拟合内符合精度值并不为零。通过对已知点拟合残差进行改正得到一种改进的Kriging法来精化区域似大地水准面。通过实测数据对比改进的Kriging法与Kriging法的GPS高程拟合精度,结果表明：改进的Krig-ing法的拟合精度明显优于Kriging法,该方法能有效削弱模型误差和公共点误差引起的拟合残差。
英文摘要：
When Kriging method is used in GPS elevation fitting,its accuracy is above zero because of the model errors and common point errors.An improved Kriging method is introduced to refine area quasi-geoid by correcting the fitting residual of the known point.Analysis of GPS elevation fitting accuracy through the Kriging method and the improved Kriging method by the measured data shows that the improved Kriging method has high accuracy than Kriging method,and can reduce the model errors and common point errors effectively.
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