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天文导航系统中的观测量是一个重要的精度影响因素,星光角距和星光仰角是天文导航中两种最常用的观测信息,首先介绍了这两种观测信息及其量测方程的建立,然后从天文导航系统的可观测性和可观测度的角度,以观测矩阵的条件数作为系统可观测度的度量标准,分析了由于所选用的观测量的不同所导致的系统导航性能的差别,同时给出了一种衡量天文导航系统中的观测量和系统性能的分析方法.计算机仿真结果证明了该方法的有效性.
The observational quantity in the navigation system of the celestial body is an important influencing factor of the precision. The celestial light angle and the celestial angle of the light are the two most commonly used observational information in the celestial navigation. Firstly, the two observation information and the establishment of their measuring equations are introduced. Then, From the viewpoint of observability and observability of celestial navigation system, the condition number of observing matrix is taken as the measurement standard of system observability, and the difference of navigation performance of system is analyzed due to the difference of selected observables. At the same time An analytical method to measure the observational quantities and system performance of the astronomical navigation system is given. Computer simulation results show the effectiveness of the method.