In the last sixteen years, there has been an increment in the use of Satellite communications in Iraq. It is generally used in every home in this country. However, the quality of the signal coming from different Satellite providers is still not optimised. There are several reasons which affected this service such as engineering issues and physical impact. Therefore, there is a necessity for studying this topic and focus the light on the main problems that could hinder the improvement of Satellite communications. This paper attempt to present a model that can be employed for prediction of a communication signal from the satellite and the several issues related to that model. The model is constructed from gathering various models and concepts that are necessary to consider such as the effect of non-ionised atmosphere and the ionosphere. In addition to reviewing the effect of gains from the antenna which contained in the specific equation of defining the signal power. Finally, the simulation results were compared with the outcome from measurements to examine the system reliability.