卫星热设计中β角在不同轨道下的变化规律分析

阳光矢量与卫星轨道平面之间夹角是卫星热控设计中至关重要的一个设计参数，其不仅与到达卫星表面的阳光热流密度密切相关，也与到达卫星表面的地球反射热流密度密切相关。文章根据β角的变化规律将传统意义上的轨道分为了同步轨道和非同步轨道两种，并结合升黄赤经夹角的变化规律分析了不同轨道下β角的变化规律，以及相应的热设计特点。

Study on Change Rule of β Angle for Various Orbits in Satellite Thermal Design

β angle is an important parameter in the satellite thermal design. It plays an important role in not only calculation of total incident solar flux directly from the Sun but also that of solar flux reflected from the Earth surface. Considering the change rule of β angle, a variety of orbits can be generally categorized as synchronous orbit and non-synchronous orbit. According to the change rule of the angle between right ascension of the ascending node（RAAN）and right ascen sion of the Sun（RAS）,this paper further discusses the change rule of β angle in various types of orbits and analyzes the feature of thermal design in corresponding orbits.