利用区域地基GPS的电离层层析成像研究

电离层是近地空间的重要组成部分,如何对电离层的异常扰动进行合理监测与预报一直是空间物理领域的研究课题。本文将计算机层析成像技术引入到电离层扰动监测中,利用大量的区域地基GPS观测数据,借助代数层析迭代算法反演得到三维电离层电子密度;并将层析结果与国际电离层参考模型IRI2007进行对比分析,结果表明:地基GPS层析所得的电离层电子密度与IRI2007基本一致,但层析结果精度略高于IRI2007模型。

Study on computerized ionospheric tomography using ground-based GPS

Ionosphere is an important part of the near-Earth space.How to detect and forecast the abnormal ionospheric disturbances reasonably has been a hot research topic of space physics.By introducing computed tomography imaging technology into the detection of ionospheric disturbances,this paper used a large amount of ground-based GPS observation data of different areas to inverse the three-dimensional ionospheric electron density with the hel Pof algebraic chromatographic iterative algorithm.The paper also compared the chromatographic result with the international reference ionosphere model IRI2007.It was showed that ionospheric electron density inversed from the ground-based GPS chromatography was relatively consistent with the model IRI2007 but the final precision of chromatography was slightly higher than that of the model IRI2007.