北斗三期试验卫星精密定轨及对PPP定位影响的分析

基于北斗三期试验卫星的实测数据确定其精密轨道和钟差,结果表明三期试验卫星IGSO径向重叠弧段精度优于7.0cm,MEO优于5.3cm,与二期非GEO卫星相当。采用相应轨道和钟差产品进行静态精密单点定位结果表明,在加入北斗三期试验卫星后,监测站坐标平面精度优于1.0cm,高程精度优于2.6cm,相对于仅采用北斗二期卫星定位结果分别提高0.5cm和1.2cm,且收敛时间缩短约2h35min。

Precise Orbit Determination for Beidou-3 Experimental Satellites and Its Impact on PPP

In this paper, we determine precise orbit and clock of Beidou-3 experimental satellites based on data from several tracking networks. The results indicate that the orbit overlap accuracy in radial direction of Beidou-3 experimental satellites is better 7.0 cm for IGSO satellites and 5.3 cm for MEO satellites, respectively, which is equivalent to that of the Beidou-2 of non-GEO satellites. In addition, solutions of static precise point positioning (PPP) show that better than 1 cm in horizontal and 2.6 cm in vertical direction can be achieved when orbit and clock products of the Beidou-3 experiential satellites are included. Compared to the Beidou-2 only PPP solutions, the results are improved by 0.5 cm and 1.2 cm respectively, and speed up the convergence rate, reducing convergence time by about 2 h 35 min.