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GPS电离层延迟误差修正中二阶项角度的分析
张成义,赵威,詹煜,杨星星
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(南京信息工程大学数理学院，南京 210044)

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G PS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。

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

DOI：

基金项目:

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

ZHANG Cheng-yi,ZHAO Wei,ZHAN Yu,YANG Xing-xing

(College of Mathematics and Physics,Nanjing University of Information Science an d Technology,Nanjing 210044,China))

Abstract:

Utilizing triple-frequency observation value to co rrect secondorder of ionosphere delay errors is proposed in this paper.With th is method th e delay errors can reach millimeter-scale accuracy. Theoretical analysis shows t h at the total electron content(TEC) and the critical angle between the direction of GPS propagation and geomagnetic field are main factors influencing the corre ction result to millimeterscale.Through selecting the value of TEC and diff erent frequencies, the angles required by the correction result reaching millime ter scale accuracy are figured ou t under normal conditions. The algorithm proposed can be seen as a reference for accurate positioning of GPS.

Key words: ionosphere delay errors triple frequency second order accurate positioning