提出了以惯性导航为主、天文导航为辅的一种导航方法，推导出该方法对应的导航基准参数计算模型、导航参数计算模型及天文导航系统的横向导引方程。

A navigation method that the in method is principal and the CN method is subordinate is presented. The calculation model of navigation standard parameter and navigation parameter is deduced.

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以前，人们主要利用太阳、星星等自然天体。现在人们利用的导航系统主要有：天文导航系统、惯性导航系统、无线电导航系统三大类。

At ancient times, people were navigated by means of sun, fixed stars, etc., while currently the common navigation systems are astronomic navigation, inertial navigation and radio navigation.

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