【摘要】 卫星干扰源定位系统,是通过测量两颗相邻同步卫星对干扰辐射源形成的时差观测量和频差观测量来实施未知干扰源定位,在此过程中,两颗相邻同步卫星的星历误差是影响定位精度的主要因素,因此,星历校正技术是整个系统一个关键环节。针对星历校正技术中的卫星动力学模型选取、状态转移矩阵的计算和简化等几个关键问题作了详细深入的论述,给出了具有典型意义的力模型选取标准和状态转移矩阵的计算方法,设计了一种基于短弧轨道改进原理的星历校正算法,通过仿真数据和实测数据处理证实,定位误差可从千千米量级校正至十千米量级,验证了该算法的可行性和定位精度。更多还原

【Abstract】 Satellite interference location system uses time difference of arrival(TDOA) and frequency difference of arrival(FDOA) measurement techniques due to two nearby geostationary satellites.Ephemeris errors of them are essential for the accuracy of locating the satellite interference,and ephemeris calibration technique is a key important technique in the satellite interference location system.In this paper,we discuss satellite orbital force model selection and the algorithm of satellite sate transition matrix,based on which we designed ephemeris calibration algorithm with short arc orbit determination theory.We also carry out validity checks by using simulation data and real data,where the interference location error is degreased from several thousand-kilometers to several ten-kilometers,and the results confirm the precision of the ephemeris calibration algorithm proposed here.更多还原