基于Chapman函数反演电离层电子密度  

INVERSION OF IONOSPHERIC ELECTRON DENSITY BASED ON CHAPMAN FUNCTION

作　　者：刘伟[1] 郑作亚[1] 郭英[1,2] 徐运广[1] 

机构地区：[1]山东科技大学测绘科学与工程学院,青岛266590 [2]中国测绘科学研究院,北京100830

出　　处：《大地测量与地球动力学》2013年第2期120-123,共4页Journal of Geodesy and Geodynamics

基　　金：山东科技大学研究生科技创新基金(YCB120114)

摘　　要：利用Chapman函数结合球谐函数建立电离层反演计算方法,并以静日下中国区域GPS CORS实测数据反演中国区域上空的电离层电子密度值,反演得到的电离层的延迟量与已知值比较,其残差中误差为0.311 m;对垂直方向上和一定高度层面上的电离层电子密度变化的研究表明,运用该方法计算的电子密度具有较高的精度,并能较为直观地反映出电离层不同层间电子密度变化的一致性。Using the Chapman function and the ionosphere inversion methods and processes combined with the spherical harmonic function. The ionospheric electron density is calculated by using the data measured from the GPS CORS in the Chinese region under the static subsolar. The delays through the ionosphere calculated are compared with the known data and the RMSE of residuals is 0.311 m. The ionospheric electron density variations of the vertical structure and the certain height level of ionosphere are also analyzed. The results show that from the residuals analysis and the electron density trend, the accuracy of the electron density calculated with the method is high and it can be more intuitive to reflect the consistency of the electron density changes between different layers of ionosphere.

关 键 词：GPS 电离层 Chapman函数 球谐函数 电子密度 

分 类 号：P227[天文地球—大地测量学与测量工程]