GPS电离层延迟误差修正中二阶项角度的分析  

Analysis of Second-order Angle in Correction of GPS Ionosphere Delay Errors

作　　者：张成义[1] 赵威[1] 詹煜[1] 杨星星[1] 

机构地区：[1]南京信息工程大学数理学院,南京210044

出　　处：《电讯技术》2011年第8期70-74,共5页Telecommunication Engineering

基　　金：南京信息工程大学基金课题(10jy004)~~

摘　　要：提出了一种利用三频观测值修正电离层延迟误差二阶项的方法,可使延迟误差达到毫米级精度。理论分析表明,影响修正结果达到毫米级的主要因素是总电子含量(TEC)和GPS信号传播方向与地磁场方向的临界夹角。取通常情况下TEC的值,在不同频率条件下,通过解算给出了达到毫米级精度所要求的临界夹角值。研究结果对精密定位过程信号的接收提供了参考方法。Utilizing triple - frequency observation value to correct second-order of ionosphere delay errors is pro- posed in this paper. With this method the delay errors can reach millimeter- scale accuracy. Theoretical analysis shows that the total electron content（TEC） and the critical angle between the direction of GPS propagation and geomagnetic field are main factors influencing the correction result to millimeter-scale. Through selecting the val- ue of TEC and different frequencies, the angles required by the correction result reaching millimeter-scale accu- racy are figured out under normal conditions. The algorithm proposed can be seen as a reference for accurate po- sitioning of GPS.

关 键 词：全球定位系统 电离层 延迟误差 三频 二阶项 精确定位 

分 类 号：P228.4[天文地球—大地测量学与测量工程]