中国沿海RBN-DGNSS系统北斗差分定位性能测试及分析

提出北斗伪距差分和北斗/GPS联合伪距差分算法,并利用中国北斗沿海差分台站播发信号进行陆地定点和海上动态测试。结果表明,在距台站300km以内,北斗平面定位精度优于1.5m(95%置信水平),高程定位精度优于2.5m(95%置信水平);GPS+北斗联合定位精度、数据有效率均优于单独GPS或北斗系统;单独北斗系统的定位精度和性能优于RBN差分系统设计要求。

Beidou Differential Positioning Performance Test and Analysis for  Coastal RBN-DGNSS System in China

This paper presents a Beidou only and Beidou/GPS combined pseudorange differential positioning algorithm for the great application demands of Beidou navigation satellite system (BDS) precise navigation at sea. Land fixed-point test and maritime dynamic test for China’s coastal differential stations’ signal are conducted and the test results are analyzed in this paper. Test results show that: 1) when the distance between user and station is less than 300 km, horizontal positioning accuracy of Beidou is better than 1.5 m (95% confidence level), and vertical positioning accuracy is better than 2.5 m (95% confidence level)| 2) positioning accuracy and data efficient rate of GPS+Beidou combined positioning is better than only GPS/Beidou systems| 3) only Beidou positioning accuracy and positioning performance are satisfied with RBN differential system design requirements.