  Equatorial ionospheric irregularities have been studied in the past and have
produced interesting insights into ionospheric physics and processes. Here, we
present the initial results of a long-term study of the ionosphere near the
Equatorial Ionization Anomaly (EIA) using Navigation with the Indian
Constellation (NavIC). We have characterized the ionospheric irregularities in
terms of the power spectral density at different dynamical frequencies. The
formalism is similar to as suggested by earlier works using the phase screen
modeling of the ionosphere. The observations of the C/N 0 (dB-Hz) variation
have been taken by utilizing the L5 (1176.45 MHz) signal of NavIC over Indore
located near the northern crest of EIA. We show some initial results as a proof
of concept study from a single day (December 4, 2017) of scintillation
observations. This is a first-of-its-kind study in this region with NavIC. From
the power spectral density analysis, we have demonstrated that NavIC is capable
of detecting such irregularities over long periods over this region and has
implications for forecasting such events in the future.
