用于GEO定轨的CEI基线布设及选址研究

Distribution of CEI Baselines in Orbit Determination for Geostationary Satellite

短基线相位干涉测量（CEI）是一种被动测角跟踪方法，测量精度高，可用于卫星测轨跟踪。本文利用该方法对静地卫星（GEO）的跟踪基线网的布设及选址问题进行了仿真计算。仿真结果表明，利用一组10km的连线式正交双短基线，将其以V型方式布设定轨精度最高，可以保证GEO在沿迹向达26m、径向和法向达分米级的定轨精度。对于单颗卫星，基线应布设在星下点附近；对于我国北斗系统中的卫星网，基线应布设在我国西南部低纬度地区。

The connected - element interferometry （CEI） is a passive angular tracking method. With its high measure accuracy, it can be used in orbit determination and tracking. Some simulations were clone about the distribution of the tracking baselines in orbit determination for geostationary satellite. The simulation results indicated that when one set of dual -orthogonal baselines 10kin in length was used, the orbit determination accuracy could reach to 26m in along- track positional component, several decimeters in radial component and crros -track component by the mode of V - shape. As to orbit determination of single satellite, the baselines should be distributed near the sub satellite point （SSP） ;as to orbit determination of the satellites in the Bei Don - 1 system, the baselines should be distributed in the southwest of our country.