卫星导航定位系统中监测站URE解算研究

Research of calculating station URE of satellite navigation system

针对监测站接收数据有限的问题,提出一种利用有限数据计算用户距离误差(URE)的方法:首先分别利用Klobuchar模型和Hopfield模型对接收机的观测伪距进行电离层和对流层修正,在此基础上进行卫星钟差和接收机钟差改正;最后利用多普勒观测值进行地球自转效应和相对论效应修正,得到修正之后的伪距。通过4台监测接收机的修正伪距,利用最小二乘法对卫星定位,计算出卫星在地心地固坐标系中的坐标,与直接利用广播星历计算出来的坐标在RTN坐标系中进行比对,最终计算出URE。结果表明该方法对监测站的数据后处理有一定的参考作用。

Based on limited receiving data,the article preposed a URE calculating method.It first revised the ionosphere and troposphere of pseudo-range using Klobuchar and Hopfield model,and revised satelliting clock bias and receiving clock bias,then getting correct pseudo-range after revising the Earth＇s rotation and relativism.By calculating the satellite coordinates in geocentric axes using least square method,compared with the coordinates in RNTsystem,finally it got the URE.The result showed this method could provide a reference for data after treatment.