利用SLR对GLONASS-M卫星系统精密定轨研究

Precise Orbit Determination of GLONASS-M Satellite System based on SLR

利用人卫激光测距(SLR)技术,构建了GLONASS-M卫星的精密定轨模型,并以CODE GNSS数据分析中心发布的GLONASS精密星历作为标准轨道,得到SLR定轨误差在测距方向精度可以达到10cm,对于连续的21天时间序列SLR定轨精度径向可以达到30cm,三维方向可以达到1m以内,以CODE的轨道产品为标准轨道为SLR定轨结果进行精度评定,其定轨精度相当。对比分析了不同弧段、不同轨道面的GLONASS-M卫星的定轨精度,采用7天的定轨弧长对GLONASS导航卫星进行SLR定轨可得到最优解。

The precision orbit determination model of GLONASS-M satellite is established by using the SLR technology.The GLONASS precision ephemeris published by the CODE GNSS data analysis center is used as the standard orbit to obtain the SLR orbit determination error.The precision of direction can be up to 10cm. For the continuous 21-day time series,the accuracy of SLR orbit determination can reach 30cm in radial direction and less than lm in three-dimensional direction.The rail product of CODE is the standard orbit for accuracy evaluation of SLR orbit determination.Accuracy.The orbit determination accuracy of the GLONASS-M satellites with different arcs and orbits is analyzed and compared.The optimal solution of the GLONASS navigation satellites is obtained by using the 7-day orbit length.