Ionospheric Models as an Aid for the Calculation of Ionospheric Propagation Quantities

This paper is a continuation of a study announced in a previous paper by the author [1]. Results are given in the form of curves, and a comparison is made with ionograms. The important influence of radiation angle on the MUF (maximum usable frequency) is shown. A large enough number of adequate models (60 to 100) might be valuable to the radio engineer for prediction and design purposes.