利用BDS/Galileo广播星历的卫星位置及速度计算

Calculation on satellite position and velocity by BDS/Galileo broadcast ephemeris

针对当前由BDS、Galileo广播星历计算卫星位置、速度及其精度分析的研究相对较少的问题,给出了利用上述广播星历计算卫星位置、速度的具体思路,并将计算结果与其他研究机构公布的精密星历进行比较。结果表明:Galileo广播星历解算的卫星位置误差最大在3m左右,BDS广播星历解算的地球同步轨道卫星位置误差最大在40m左右,倾斜地球同步轨道卫星位置误差最大在9m左右,中地球轨道卫星位置误差最大在5m左右;Galileo、BDS速度误差在1mm/s以内。

Aiming at the insufficiency of studing on the calculation and accuracy analysis on satellite position and velocity by BDS and Galileo broadcast ephemeris,this paper proposed the specific consideration of the calculation,and compared the accuracy with those precise ephemeris published by other research agents.Result showed tha the error of satellite position by Galileo broadcast ephemeris was about 3mat most,the biggest error of geostationary Earth orbit satellite position by BDS broadcast ephemeris was about 40 m,the error of inclined geosynchronous Earth orbit satellite position was about 9mat most,and the biggest error of medium Earth orbit satellite position was about 5m;moreover,the velocity accuracies of BDS and Galileo satellite were both within 1mm/s.