دراسة العلاقة بين زاوية ارتفاع الهوائي و الضياع الناتج عن غازات الاتموسفير للوصلة الهابطة في نظام الاتصال الفضائي

This research is a study of the relation between antenna elevation angle and atmosphere loss. The study includes a theoretical analysis of how atmosphere neutral gases affect the downlink of the received signal strength. A mathematical modeling using Matlab has been applied in order to get optimized elevation angle to process the downlink pass loss, taking the temperature and water vapor density into consideration. The research comes up with some conclusions that would help in choosing the best suitable elevation angle for downlink of the earth station antenna for all possible values of temperature degrees and water vapor densities.