Study on a Method of Calculating the Ionosphere TEC Using RDSS System Observation Data

In this paper, a method of calculating the ionosphere TEC （Total Electron Content） is proposed using RDSS （Radio Determination Satellite Service） System observation data, and gained the ionosphere vertical TEC and its diurnal variation tendency of center station region using one month＇s data. The result indicates that the ionosphere TEC derived from the RDSS observational data touch bottom at about 4 o＇clock and come to a peak at 14 o＇clock （Beijing Time）, which matches the physical rule that the ionosphere is affected by the solar zenith angle. Using the calculating method introduced in this paper, the TEC of ionosphere can be properly derived, and the trend of TEC would be properly got. This method is feasible and valid. Some errors, which might exist, are also disassed in this paper.