Retrieval and validation of ionospheric measurements from COSMIC radio occultation
COSMIC掩星电离层资料反演以及结果验证

The relative total electron content (TEC) is obtained through the combination of COSMIC radio occultation ionospheric measurements L1 and L2 phase. The TEC data are then calibrated by non-occultation observation data on the auxiliary side to remove portion of TEC above the LEO orbit altitude. The electron density profile can be retrieved from TEC by Abel integral transformation,with a spherically symmetric assumption of electron density and an approximation of signal straight-line propagation. The computati...