基于星间无线电"自收自发"测距的高精度卫星定轨方法

针对无线电信号在传播过程中存在的时间和空间上的误差相关性，结合卫星星座内的整网观测，提出了一种所谓信号“自收自发”的卫星跟踪与测量技术。通过星上天线接受和发送网内所有卫星(包括自身)的数据通信，获得相互间的距离信息，同时采用一种互差分的数据处理方法，进行卫星位置的解算。通过具体仿真计算，并与卫星的GPS自主定轨方法相比较，结果表明，此方法确实有效，能很大程度提高卫星的定轨精度。此外，文中还分析了该方法实现的主要技术难点，并给出了相应对策。

An Approach for Satellite High Precise Orbit Determination Based on Wireless Self-transmitting and Receiving Distance Measure On-board

The error of wireless signal in transmitting process is correlative in temporal and spatial region. So an approach for satellite high precise orbit determination based on wireless self-transmitting and receiving distance measure on-board is presented. Through observing the whole satellite-net, this approach utilizes one of the satellites(the user satellite) in the net to transmit and receive the signal to and from all the other satellites(including itself), accordingly the mutual distance information is obtained. In addition, a mutual difference method is used to deal with the measure data and calculate the three-dimensional satellite position. The simulation which is compared with GPS autonomous orbit determination technology indicates that this approach is effective and can realize satellite POD(precise orbit determination). Furthermore, the main challenging issues in this approach are discussed as well and some solutions to this problems are presented.