  Solar flare is one of the most important solar activities which emit all
electromagnetic waves in gigantic burst. The radio emission can be used to
determine the physical properties of the solar flares. The e-CALLISTO worldwide
network is designed to detect the radio emission of the solar flares and this
study used the spectroscopic data from the e-CALLISTO system. Among the five
types of solar radio bursts, this study was focused on type II radio bursts.
The spectroscopic analysis estimated the shock speed of type II radio bursts
using the uniform electron density model and the nonuniform electron density
model of the sun. The shock speed is proportional to the electron density (Ne)
and inversely proportional to the rate of change in electron density with
altitude (dNe/dr). The determined shock speed at the altitude of one solar
radius is 2131 km/s for uniform model and 766 km/s for non-uniform model.
Although the uniform electron density model is widely used we attempted the
non-uniform electron density since in the active region of the sun, the
electron densities are non-uniform. The estimated shock speeds of uniform
density model is relatively high so that it is reasonable to use non-uniform
electron density model for shock speed estimation of type II radio bursts.
