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卫星探测是当今空间飞行器观测与轨道估计的重要方式.针对空间飞行器轨道估计及卫星无源探测的误差分析等问题,在双星观测条件下,使用样条插值及拟合的方法对包含随机误差和系统误差的初始数据进行光滑处理,然后基于立体几何和逐点交汇的思想建立了运动方程参数模型,采用最小二乘法估计参数,得到了空间飞行器的估计轨道,并使用LMF法进行了系统误差分析.针对单星观测的情况,一方面,认为飞行器轨道上的点共面且均在过地心的平面内,另一方面,通过建立飞行器轨道模版数据库与观测相对比,了解识别是何种飞行器.添加了这些约束和先验信息后,可以得到大致的轨道估计.
Satellite exploration is an important way of spacecraft observation and orbit estimation.Aiming at the problem of spacecraft orbit estimation and satellite passive detection error analysis and so on, under the condition of double star observation, The initial data of the system error is smoothed, and then the equation model of motion equation is established based on the idea of solid geometry and point-by-point convergence. The least square method is used to estimate the parameters, and the orbit of the space vehicle is obtained. The system error analysis In the case of single-star observation, on the one hand, it is considered that the points on the orbit of the aircraft are coplanar and all are in the plane of the geocentric center; on the other hand, by establishing the comparison of the orbit template database with observations, After adding these constraints and prior information, you get a rough orbit estimate.