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《Science of Surveying and Mapping》 2009-02
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The application of the time series analysis to GPS residuals

XU Rui, HUANG Ding-fa, ZHOU Le-tao,LI Cheng-gang(Center for Geomation Engineering, Southwest Jiaotong University, Chengdu 610031, China)  
The noise and the usable signal (e.g. multipath and atmospheric information) were always contained in GPS observation residuals. How to separate them effectively is always the critical issue in GPS data modeling. From this point, firstly, the zero baseline SD model and the time correlation analysis method were used to study the time correlation properties of the GPS observation noise. Then it is proven that GPS observation noise is analogous to the white noise or the one-order gauss-markov process. With such important result, multipath was successfully separated and, for the first time, it is confirmed that the multipath will repeat in consecutive sidereal days. At the end of the paper, the method to research the periodic signal (such as ocean tide, ice age rebounding) in the GPS was proposed, also the feasibility of the method was discussed.
【Fund】: 国家自然科学基金资助项目(40271091);; 教育部博士点基金资助项目(20040613025);; 教育部优秀教师资助计划(2003109)
【CateGory Index】: P228.4
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