北斗伪距单点定位与差分定位结果精度分析

Precision Analysis on Results of BDS Pseudorange Point Positioning and Differential Positioning

首先介绍了北斗伪距单点定位、伪距差分定位的基本原理和数学模型,然后根据自编程序,利用同济大学TJA站8天的数据进行计算及分析。结果显示:北斗伪距单点定位的精度平面方向上达到3.5m以内,高程方向优于8m,满足普通导航定位的需求。北斗差分定位的精度较伪距单点定位精度有了较大提高,其精度平面上达到1m以内,高程方向优于1.5m,能满足较高精度的需求。

In this paper, we first introduce basic principles and mathematical models of the Beidou pseudorange point positioning and pseudorange differential positioning, and use 8-day data of Tongji university TJA station for calculation and analysis by our program. The results showed that the plane precision of those results can be up to 3.5 meters, and 8 meters for elevation positioning precision, to meet the needs of ordinary navigation. The pseudorange differential positioning precision, up to lm in the plane direction and higher than 1.5m in the elevation direction, is better than the pseudorange point positioning precision to meet the needs of higher precision.