中文摘要：

针对BDS星间单差伪距单点定位精度以及接收机钟误差影响定位精度的问题,该文分析了BDS非差、GPS星间单差、BDS星间单差的伪距单点定位的解算模型,研究了3种定位模式在观测时段内的卫星数、PDOP值以及伪距单点定位精度的差异,并对不同定位模式在同一时段内的定位结果与真值进行比较。实验结果表明：BDS星间单差定位结果的稳定与BDS非差结果相当,并且都略高于GPS星间单差的稳定性;从精度而言,BDS星间单差在E、N方向上精度相比其他两种定位模式得到了一定程度的提高,在U方向上精度介于其他两种定位方式之间。

英文摘要：

In view of the influence of the accuracy of single point positioning based on inter-satellite single difference method and the receiver clock error, the difference of satellite numbers, PDOP value and precision of the pseudorange point positioning of three calculating formulas including BDS single point positioning, BDS inter-satellite single difference method, and GPS inter-satellite single difference method were analyzed; the positioning results of different positioning formulas in the same time period were compared with true value. The results showed as follows, the results of inter-satellite single difference of BDS were stable and its accuracy was close to BDS single point positioning, and had slightly higher stability than GPS inter-satellite single difference; in terms of accuracy, the accuracy in direction of E and N were improved to a certain extent compared to the other two formulas, and the accuracy in the direction of U was between the other two kinds of positioning methods.