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中文摘要：
多路径效应是GPS高精度实时动态变形监测中的主要误差源，通过经验模态分解方法对三维坐标序列进行多尺度分解和重构，提取作为趋势项的多路径模型；并利用多路径效应的周日强相关性特点，对第二天动态坐标进行多路径效应去除，得到削弱多路径效应后的坐标序列。研究结果表明，多路径效应削弱后的坐标序列稳定性明显增强，坐标的精度明显提高。
英文摘要：
The GPS signal multipath effects is considered as a major error sources for the high-precision real-time dynamic deformation monitoring. The trend being extracted from the three-dimensional coordinate series are multipath model by using empirical mode decomposition（EMD） method;The research demonstrates that the multipath effects have strong correlation between two successive days, and after the coordinate series being corrected through the first day＇s multipath model, the new coordinate series generate. The result shows that the stability and the accuracy are markedly improved after multipath effects being removed.
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