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通过COSMIC掩星电离层观测资料L1和L2相位组合,得到相对总电子含量TEC;利用非掩星的辅助观测数据校正TEC,消除LEO卫星高度以上的TEC部分;在电子密度局部球对称假设和信号直线传播的近似下,通过Abel积分变换可以得到电子密度垂直廓线.将2007年度中与电离层测高仪站点经度差小于10°,纬度差小于2°的4903个COSMIC掩星电离层资料与相对应的电离层测高仪数据进行比较,F2层的临界频率f0F2的标准差约为0·59MHz,峰值高度hmF2的标准差约为33·08km.
Through the COSMIC occultation ionosphere observation data L1 and L2 phase combination, get the relative total electron content TEC; using non-occultation auxiliary observation data to correct TEC, eliminate LEO satellite above the TEC part; in the electron density local spherical symmetry hypothesis and signal In the approximation of linear propagation, the vertical profile of electron density can be obtained by Abel integral transformation.According to the data of 4903 COSMIC occult ionospheric data that the longitude difference between the mid-2007 and the ionospheric altimeter stations is less than 10 ° and the latitude difference is less than 2 °, The corresponding ionospheric altimeter data are compared. The standard deviation of f0F2 for the F2 layer is about 0.59 MHz, and the standard deviation of the peak height hmF2 is about 33.08 km.