摘要
针对北斗卫星伪距定位研究较少的现状,该文分析了北斗B1、B2和B3的伪距质量,给出了采用不同频点伪距定位时需考虑的因素,探讨了使用广播星历时北斗多频伪距单点定位的定位性能。结果表明,B3频点的伪距多路径效应和观测噪声优于B1和B2;单频定位时,各频点定位平面精度优于5m,高程精度优于10m,且B1的定位精度最高;双频定位时,B1/B2无电离层组合的定位性能略高于B1/B3,平面精度优于3m,高程精度优于5m,并且B2/B3的噪声太大,不适用于导航定位。
Aiming at the current status that the study on BDS pseudo-range positioning is insufficiency, the paper analyzed the pseudo-range quality on frequencies B1, B2 and B3 of BDS, considered the biases of different frequencies in the positioning, and then presented the solution of multi-frequency SPP by using the broadcast navi- gation message, Experimental result showed that the multipath effect and the observation noise of frequency B3 would be better than those of B2 and B1; on slngle-frequency positioning, the horizontal accuracy of each frequen- cy would be better than 5m, while the vertical better than 10m, with the best performance of B1 frequency; on double-frequency positioning, the performance of B1/B2 would be a little better than B1/B3, the horizontal accu- racy of each combination would be better than 3m, the vertical better than 5m; besides, due to the big noise, B2/B3 could be not suitable for positioning and navigation.
出处
《测绘科学》
CSCD
北大核心
2016年第3期8-11,共4页
Science of Surveying and Mapping
关键词
BDS
伪距质量
单点定位
TGD
B3
BDS
pseudo-range quality
single point positioning
TGD
B3
