基于压缩估计的单星观测定轨方法研究

分析了单星观测模式下的天基测控系统的可行性,并针对该观测模式下轨道确定中法矩阵的特点,提出了一种基于压缩估计的定轨方法,该方法对法矩阵进行变换,避免了法矩阵奇异造成的误差传递。证明了当满足一定条件时,该压缩方法的估计精度要高于传统的定轨方法。并结合单星观测的特殊性,提出了误差传递因子,设计了单星观测下的压缩估计定轨算法。最后以单星模式下的天基测控系统作为仿真背景进行了仿真试验。结果表明,该压缩估计可有效提高单星观测模式下的轨道确定精度。

Research on the method for orbit determination of single satellite observation based on constringent estimation

Feasibility of Space based Tracking Telemetry and Command System (TT C) based on single satellite is analyzed. A new orbit determination method based on constringent estimation is proposed according to the mode of single satellite observation. In the process of the orbit determination, the law matrix is availably transformed by the constringent estimation to restrain error of singularity cased by law matrix. It is proved that the precision of constringent estimation is higher than traditional method on the given conditions. Then the error transmitting coefficient (ETC) of observation was researched on, on the base of ETC and constringent estimation, the algorithm of orbit determination is put forward. Finally the validity of the new method is proved with simulation experiments.