应用天文研究组知识库

基于卫星双向时间频率传递技术的转发式卫星测定轨技术,可精确地测定地面站到卫星间的距离,并能实现各站间高精度时间同步。中国区域定位系统(Chinese Area Positioning System,CAPS)按国内最佳布局建立了VSAT(小口径终端)转发式卫星地面测定轨网,昆明卫星地面站是中国区域定位系统卫星测定轨网的重要组成部分之一。昆明卫星地面站的仪器频率全部由高精度原子钟提供,仪器参数可以设定,仪器时延能够实时精确地测定,是一个全自动的转发式卫星地面站,为中国区域定位系统高精度卫星测定轨提供有力支撑。

Determination of satellite orbit by transfer,based on the Two Way Satellite Time and Frequency Transfer,is implemented with the observations of multi-stations. The distances between a satellite and ground stations are determined. The net of ground stations with the VAST system is established for the CAPS project.Kunming station is one of them. The frequency of all equipments in Kunming is controlled by an atomic clock and all status can be set up as well as monitored. The time delay of instruments can be determined. It can carry out functions such as orbit determination and time synchronization at remote stations.