【作者】 曲伟菁； 胡小工； 吴斌；

【Author】 Weijing Qu~(1,2),Xiaogong Hu~2,Bin Wu~2 1.the graduate university of Chinese Academy of Sciences,Beijing,China 2.Shanghai Astronomical Observatorye,Shanghaiy,Chinay

【机构】 中国科学院研究生院； 中国科学院上海天文台；

【摘要】 利用GPS提供的初始北京站坐标,对Lageos卫星的人卫激光测距(SLR)残差平均值在10-40cm左右,RMS在4-10cm左右,大大高于测量的噪声水平,其原因可能是初始站坐标不准确。因此本文利用北京人卫激光站2010年9月份对Lageos1卫星、Lageos2卫星的观测数据估计该站的坐标。考虑到观测数据较少(Lageos1卫星10圈数据,Lageos2卫星12圈数据),我们采用与常规的SLR站址估计算法不同的方法重新解算站坐标。根据新方法得到的残差均值为0cm,RMS在5cm以内。而利用Lageos1卫星数据得到的站坐标与初值相比高程方向相差51.07cm,水平方向相差2.96cm。利用Lageos2卫星数据得到的站坐标与初值相比高程方向相差36.3cm,水平方向相差5.49cm。综合两颗卫星数据得到的站坐标与初值相比高程方向相差38.3cm,水平方向相差1.58cm。从结果来看,北京站坐标主要在高程方向有较大的变化。更多还原

【Abstract】 For the Beijing satellite laser ranging(SLR) station,with the an apriori coordinates provided by GPS surveying,the average of the SLR residual is about 10-40cm and the standard deviation is about 4-10cm,which are higher than the noise level expected.The reason is that the an apriori coordinates are not accurate enough.In this paper,we use SLR data to both Lageosl and Lageos2 that were collected during September,2010 to estimate the coordinates of the Beijing station.Given the insufficient SLR data,we devise a method that is slightly different from the traditional method for precise SLR positioning.According to the new method,the average of the residual is 0cm and the RMS is within 5cm.The difference between the new coordinates and the apriori ones provided by GPS is about 51cm in height direction and 2.96cm in horizon directions using Lageosl data alone.The difference is 36.3cm in height direction and 5.49cm in horizon directions using Lageos2 data alone. The different is 38.3cm in height direction and 1.58 cm in horizon direction when both Lageosl and Lageos2 data is used.更多还原