Estimation and Smoothing of TEC from NavIC Dual Frequency Data

During propagation of radio navigational signal through the ionosphere, velocity of radio signal changes due free electrons present in the path between transmitter and receiver. The delay experienced by the signal depends on the Total Electron Content (TEC) of ionosphere as well as frequency of the signal. The delay introduced by ionosphere can degrade the positional accuracy. So, in this paper we would be estimating and smoothing the total electron content from NavIC data in order to derive a proper conclusion out of it. The proposed work can be used for correcting the first order ionospheric error.