摘要
在分析GPS多路径效应特性的基础上,结合GPS动态变形监测的特点,对连续多天的观测数据解算结果采用滤波与周日位置求差相结合的方法进行数据处理。研究结果表明,多路径误差具有较强的周日重复性,在有效地削弱多路径效应的影响后,GPS动态监测的三维位置精度可以达到mm级,尤其是垂直方向的精度改善明显。
The multipath has long been considered a major error source in GPS applications. This paper analyzes the characteristics of the GPS signal multipath effects, bases on which do an experiment that considers the characteristics of dynamic deformation monitoring. The solution results of observation data to successive two days are processed by a method, which combines the wavelet filtering and the differential correction between successive two days. The research demonstrates that the multipath errors have stronger repeatability on successive days; after significantly mitigating the influence of muhipath effects, the accuracy of threedimensional positioning for GPS dynamic deformation monitoring can attain the mm level, an obvious accuracy improving particularly in vertical component. The characteristics of GPS signal multipath, the experimental scheme and the qualitative and quantitative analysis of results are detailed.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2005年第10期877-880,共4页
Geomatics and Information Science of Wuhan University
基金
武汉大学地球空间环境与大地测量教育部重点实验室开放研究基金资助项目(020907)
关键词
GPS动态定位
变形监测
多路径效应
规律性
GPS dynamic deformation monitoring muhipath effects error characteristic
