空间预警系统的关机点时间估计及精度分析

在空间预警系统中,由于系统采用红外测量,数据采样率低,很难直接获得关机点的高精度观测值.分别针对单星和多星预警系统,在已知先验信息的条件下,首先基于一次具体的测量,给出了合理的关机点时间的估计方法,分析和计算了参数估计的误差分布函数和估计精度;然后在不考虑具体测量情况下,得到了整个预警系统的关机点时间估计精度的量化表达式.这有助于深入了解关机点时间参数估计的特性,也为落点的精度估计提供了依据.

Estimation of Burnout Time and Precision Analysis in Space Early Warning System

In the space early warning system, infrared scan measurement and low sample rate make it difficult to acquire high precision burnout time. Aiming at single satellite and multiple satellites early warning system respectively, in the condition of the prior information, firstly, based on the concreate measurement data, we present the reasonable estimation of the burnout time, analyze and calculate the estimation error probability function and precision. Then, not considering the concrete measurement, we present the quantification expression of estimation precision of burnout time. All the results are very helpful for us to know the features of the estimation of burnout time, and also provide useful data for the precision estimation of the impact point.