| HY2A卫星的GPS/DORIS/SLR数据精密定轨 |
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| 引用本文： | 周旭华,王晓慧,赵罡,彭海龙,吴斌.HY2A卫星的GPS/DORIS/SLR数据精密定轨[J].武汉大学学报(信息科学版),2015,40(8):1000-1005. |
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| 作者姓名： | 周旭华 王晓慧 赵罡 彭海龙 吴斌 |
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| 作者单位： | 1中国科学院上海天文台,上海,2000302国家卫星海洋应用中心,北京,100081 |
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| 基金项目： | 国家自然科学基金资助项目(11173049,11203058,11103064)；海洋公益性行业科研专项资助项目(201105032) |
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| 摘 要： | 采用HY2A卫星2013年2月的实测数据,研究了GPS、星载多谱勒无线电定轨定位系统(DORIS)及卫星激光测距(SLR)三种观测数据的单独和联合定轨问题。通过与法国CNES的精密轨道数据比较发现:分别采用GPS、DORIS和SLR数据进行单独定轨,GPS数据确定轨道的径向平均精度为1.3cm,三维位置约为6.2cm;DORIS定轨的径向平均精度为1.6cm,比GPS结果略差;SLR确定轨道的径向平均精度为2.3cm。用GPS、DORIS和SLR三种数据联合定轨,确定轨道的径向平均精度为1.2cm,三维位置约为6.5cm。与星载GPS定轨结果比较,三种观测数据的联合定轨在提高卫星轨道确定精度上不明显,但联合定轨有利于保持计算轨道精度相对稳定。用站星间高度角大于60°的SLR数据检验GPS/DORIS联合确定的轨道,两者在测距方向的均方差为2.5cm,可见基于HY2A的观测数据可以实现cm级的定轨需求。
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| 关 键 词： | HY2A卫星 GPS DORIS SLR 精密定轨中图法分类号:P228.41 文献标志码:A |
| 收稿时间： | 2013-12-03 |
The Precise Orbit Determination for HY2A Satellite Using GPS,DORIS and SLR Data |
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| Institution: | 1Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;2National Ocean Satellite Application Center,Beijing 100081,China |
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| Abstract: | The problem of precise orbit determination was studied using three kinds of HY2Aobserva-tional data of GPS,DORIS and SLR separately and together in February 2013.Comparing the derivedorbits with CNES precise orbits,the results show:(1)Using GPS,DORIS and SLR data separately,the GPS data to determine the radial orbit of average accuracy was 1.3cm,the three-dimensional posi-tion was about 6.2cm;the radial average accuracy of the DORIS solution was 1.6cm,and slightlyworse than the results of GPS;and SLR to determine the radial orbit of the average accuracy was 2.3cm.(2)Comparing the CNES orbits with the orbits derived from GPS,DORIS and SLR data togeth-er,the difference of RMS was 1.2cm in the radial direction,and the three-dimensional position was6.5cm.Compared to GPS solution,the combined three kinds of data cannot improve the accuracy ofthe derived orbit,but it is helpful to keep the calculated orbit in relative stability.(3)Using SLR datawith high elevation passes(above 60degrees)to validate the accuracy of the GPS/DORIS orbit,wefound the RMS of the estimated biases to be about 2.5cm,showing that HY2Adata can determinethe centimeter-level orbit. |
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