Estimation of Electron Density Profile in the Lower Ionosphere from Ionogram Data by the Full Wave Method

It is important that the electron density profile is estimated from the ionogram in the lower ionosphere. We have found a method obtained apparent heights of the ionogram from the electron density profile and the collision frequency profile. The calculated ionogram has been compared in a simultaneous experiment of a rocket instrument and the ionogram at the launching site. As the result, the calculated ionogram is not agree with the measured ionogram in the F layer. And the electron density profile of the rocket could not explain height pattern of another rocket data. So, we have estimated the electron density profile as according with the measured ionogram. The estimated electron density profile can explain the height pattern.