卫星导航系统多星座互用定位算法研究(英文)  

Study of Positioning Algorithms Based on GNSS Multi-constellation Interoperability

作　　者：宋丹[1] 许承东[1] 张鹏飞[1] 李社军 

机构地区：[1]北京理工大学宇航学院,北京100081 [2]中国伽利略卫星导航有限公司,北京100098

出　　处：《导航定位学报》2013年第4期31-35,共5页Journal of Navigation and Positioning

基　　金：the National High-Tech. R&D Program,China (No.2011AA120505);the National Natural Science Foundation,China(No.61173077)~~

摘　　要：卫星导航系统互用是当今全球卫星导航领域的关注热点和发展方向。由于可见星的增多,多星座互用可使位置精度衰减因子值减小,定位精度提高。但是当可见星数目趋于饱和,位置精度衰减因子值不再随着可见星的增加而减小时,可见星数目的增加并不能使定位精度得到显著提高。提出了一种多星座加权互用定位算法,随着可见星数目增加,位置精度衰减因子值减小不明显时,这种算法依然可以使定位精度大幅提高,且简单易行。With the development of global navigation satellite system(GNSS),interoperability among different satellite navigation systems has become a hot issue.The interoperability between different GNSS constellations can improve the positio- ning accuracy and minimize the positioning dilution of precision(PDOP)value.However,when the number of visible satellites is saturated(more than 20),the PDOP value will not decrease with the further increasing of visible satellites,and the positio- ning accuracy can't be improved any more.The positioning algorithm with weighted interoperation of multi-constellation(PAWI)is proposed in this paper.It can keep positioning accuracy improving significantly with the increasing of visible satel- lites,even the number has already saturated.Meanwhile,PAWI can save computing resources by eliminating large dimensional matrix calculations and a lot of coordinate transformations.

关 键 词：卫星导航系统 多星座互用 定位精度 位置精度衰减因子 

分 类 号：P228.1[天文地球—大地测量学与测量工程]