Generally speaking, the orbits of satellites can be divided into three types: low orbit (leo), medium orbit (meo) and high orbit (heo). However, there is no clear definition of the boundary height between the two, but generally speaking, we can use 1000 km as the boundary between low rail and middle rail, and 20,000 km as the boundary between middle rail and high rail. If divided by shape, it can be divided into circular orbit and elliptical orbit. According to the orbital period and other properties, it can be divided into general orbit, geosynchronous orbit and sun synchronous orbit. According to the inclination angle of the track, it can be divided into track, polar track, forward track and reverse track. In reality, the factors to be considered in satellite orbit are very complicated. Including atmospheric resistance, the influence of earth oblateness, the gravity of other celestial bodies, solar radiation pressure and other complex factors. All the above factors may cause the orbit of the satellite to be disturbed, which will not only affect the life of the satellite, but also seriously affect the mission of the satellite.