关键词: line-height:19.9733px, font-family:宋体, 静止轨道卫星；太阳敏感器；红外地球敏感器；轨道估计">静止轨道卫星；太阳敏感器；红外地球敏感器；轨道估计')">">

Abstract: In order to estimate orbit position of GEO satellites using existing on-board equipments, this paper describes the system composed of sun sensors and earth sensors. According to nature of orbit of GEO satellites combined with Hill equation, state equations and measurement equations of this system are established by using measurement information from sun sensors and earth sensors, as well as orbit perturbation characteristics. Simulation results show that longitude’s excursion of the satellite can be accurately estimated by this method, and it is a feasible autonomous navigation method for GEO satellites.

Key words: GEO satellite')">GEO satellite, sun sensor, earth sensor, ')">orbit’s estimation