基于站间单差相位绕转数据估计测站天线旋转速率的方法研究  

Precise Antenna Spin Rate Estimation Based on Between-Receiver Single-Difference Wind-up Observations

作　　者：蒋振伟[1,2] 袁运斌[1] 欧吉坤[1] 王海涛[1] 

机构地区：[1]中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室,湖北武汉430077 [2]中国科学院大学,北京100049

出　　处：《武汉大学学报（信息科学版）》2015年第10期1334-1338,共5页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(41231064;41004005;41074013;41174015);国家973计划资助项目(2012CB825604);国家863计划资助项目(2012AA121803);大地测量与地球动力学国家重点实验室开放基金资助项目(SKLGED2013-4-6-E)~~

摘　　要：相位绕转在GNSS定位中是一种误差源,但包含接收机天线旋转的有用信息。提出了一种基于站间单差相位绕转观测数据估计测站天线旋转速率的方法。首先由无几何距离观测值的变化判断天线旋转的开始与结束时间,然后利用单颗卫星站间差分的无几何距离观测值求出测站的天线旋转角度,以及单颗卫星的测站天线旋转速率,最后将所有卫星计算的测站天线旋转速率按照高度角加权平均得到最终的天线旋转速率。通过精心设计实验方案,经实测数据验证,该方法可以精确地估计测站天线的旋转速率,在本实验中,天线旋转平均速率估计精度约为0.5°/s。Wind-up is one error source in GNSS positioning,but contains useful information about antenna spin rates.A novel method is proposed to estimate antenna spin rate based on single-differencebetween-station wind-up effect.First,the starting and ending time of the antenna rotation is determined according to variation of geometry-free observations.Then,the antenna rotation angle can be estimated from geometry-free observations,the single-difference-between-station for single satellites,and the antenna spin rate can be obtained for a single satellite.The elevation-weighting method is used to get the final antenna spin rate.An experiment was designed,the results show that the antenna spin rate can be accurately estimated.Estimation of accuracy for the mean antenna rotation rate was about0.5degrees per second in the experiment.

关 键 词：相位绕转 站间单差 旋转速率 无几何距离观测值 

分 类 号：P228.4[天文地球—大地测量学与测量工程]