Study of temporal variation of vertical TEC using NavIC data

Determination of Vertical Total Electron Content (VTEC) and analysis of its diurnal variation is presented for NavIC data. The radio waves propagating through the ionosphere suffers from a delay depending upon the frequency of radio wave and Total Electron Content (TEC). This delay affects the positional accuracy of the navigation system. The proposed study is used to correct this delay called first order error correction.