GEO卫星轨道倾角变大后天线跟踪方法研究

针对某使用GEO卫星组网的卫星应用系统,由于GEO卫星寿命末期燃料不足,不能进行南北保持控制,轨道倾角不断变大,地面桁架式天线采用步进方式跟踪卫星困难的问题,研究提出天线的程序跟踪模式,并制定控制天线跟踪卫星的策略,即档位结合频度的控制策略。通过试验确定了最佳控制档位和频度,在实际应用中证明了该方法的有效性和优越性,解决了桁架式天线在卫星寿命末期准确跟踪GEO卫星的难题。

Reasearch on Antenna Tracking Method Based on Larger GEO-satellite Orbit Inclination Angle

In an application system of GEO-satellite networking, orbit control can not be realized due to lacking of fuel in the last phase of satellite＇s life ,so the orbit inclination angle become larger and the ground antenna with stepping pattern has much difficulty in tracking the satellite. This paper proposes a new tracking pattern of antenna, which is called the Program Tracking Pattern, and gives a policy with threshold and frequency combined to control the antenna＇s tracking of satellite. Then the best values of threshold and frequency are determined through test, and the validity and advantage of this method are proven in practical application. This method solves the difficult problem of tracking GEO- satellite in the last phase of satellite＇ s life.