空间目标天基光学跟踪可观测性分析

Observability Analysis on Space Object Tracking in Space-based Optical Surveillance

针对天基光学监视跟踪系统可观测性问题,建立了空间目标天基光学监视跟踪模型,引入跟踪滤波误差下限(CRLB)和系统可观测度定义,并提出了瞬时可观测度概念.结合仿真实验对测量条件、观测几何以及系统配置等影响系统跟踪可观测性的因素进行了分析.仿真结果表明,所提出的可观测分析方法能实现对天基光学定位跟踪系统性能的客观有效评定.

To analyze the observability of space object passive tracking,the mathematical models were built, the Cramer-Rao Low Bound （CRLB） of the tracking filter and the degree of observability were derived, and the instantaneous degree of observability was put forward. The influencing factors of observability were analyzed with the simulation results, including measurement conditions, observation geometry and system arrangement. Simulation results have indicated that the proposed observability analysis method can realize the effective assessment of the space-based optical tracking system.