一种提高差分GPS基准站定位精度的新方法  

A new approach to improving the accuracy in positioning the base station of Differential-GPS system

作　　者：杜歆[1] 李宏东[1] 顾伟康[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《浙江大学学报（理学版）》2002年第6期637-642,691,共7页Journal of Zhejiang University（Science Edition）

基　　金：国家自然科学基金资助项目(60105003);浙江省自然科学基金资助项目(600025);浙江省综合信息网重点实验室资助.

摘　　要：在差分GPS系统的应用中,基准站的精确定位是一个重要问题.本文首先介绍了C/A码差分GPS基准站的精确定位的一般方法,着重对在实践中最常用的简单平均方法做了详细分析.针对简单平均方法的不足之处,提出了一种基于精度衰减因子(DOP)加权的卡尔曼滤波方法.实验结果表明,本文提出的C/A码差分GPS基准站定位方法能够有效地提高定位精度.It is important to locate the base station in DifferentialGPS system precisely. This paper first introduces the common methods of positioning the base station in C/A code DifferentialGPS system. More attention is paid to the simple averaging method, which is in common use. Then a new method based on Kalman filter weighted by DOP is proposed according to the drawbacks of simple averaging method. The test result proves that the approach proposed in this paper can improve the accuracy of positioning effectively.

关 键 词：定位精度 差分GPS系统 基准站定位 精度衰减因子 卡尔曼滤波 全球定位系统 

分 类 号：P228.4[天文地球—大地测量学与测量工程]