短弧段ETALON卫星的SLR数据解算分析

Short-Arc Analysis of SLR observations of ETALON Satellites

提出一种短弧段ETALON卫星的SLR数据处理策略,仅解算卫星轨道、测站距离偏差、地球自转参数,并利用2018-01~10数据进行验证。结果表明,ETALON-1/2卫星定轨残差RMS分别为1.11 cm、1.08 cm;与IERS-C04产品相比,短弧段数据解算的X_(p)、Y_(p)、LOD参数误差RMS分别为2.21 mas、2.26 mas、218.30μs/d;与ILRS事后最终轨道相比,ETALON-1卫星R、T、N方向轨道精度分别为1.6 cm、8.5 cm、6.8 cm,ETALON-2卫星R、T、N方向轨道精度分别为2.1 cm、8.9 cm、8.7 cm。

We propose a new strategy of SLR data short-arc analysis of ETALON satellites in this paper,which also solves satellite orbit parameters,earth rotation parameters and range bias parameters.The new strategy is verified using the data from January to October in 2018.The results show that:the root mean square of residuals for ETALON-1/2 satellites is 1.11cm and 1.08cm respectively;compared with IERS-C04 product,the precision of X_(p),Y_(p) and LOD parameters is 2.21 mas,2.26 mas and 218.30μs/d respectively;compared with the final orbit of ILRS,the orbit accuracy of ETALON-1 satellite in radial,track and normal direction is 1.6 cm,8.5 cm and 6.8 cm respectively,while that of ETALON-2 satellite is 2.1 cm,8.9 cm and 8.7 cm respectively.