It is called celestial navigation.

它叫做天文导航。

Autonomous celestial navigation system is a typical nonlinear, non-Gaussian dynamic system.

天文导航系统是典型的非线性和噪声非高斯分布的系统。

China is an old country, its ancient people had knowledge of distant seas and of celestial navigation.

中国是一个古老的国家。它的古代人民具有远洋知识和天体导航知识。

The research of stars map bottom procession in celestial navigation has been done in this dissertation.

本文是对天文导航中星图图像进行底层处理的研究。

Based on the technical requirements of celestial navigation equipment, the overall construction of the star simulator is presented.

对该装置所采用的准直光学系统、数字可调光源进行了研究，并提出了背景光模拟的技术要求。