Computational analyses of perturbative effects on geostationary satellites: Case SGDC

This work aims to study the main perturbative effects on SGDC - Geostationary Satellite of Defense and Communication, result of the partnership between Telebrás and Brazilian Ministry of Defense. The name "SGDC" corresponds to the group of satellites that will be launched with the purpose of transmitting broadband Internet to the less favored zones of Brazil and to intermediate communication between the military sectors. Through numerical simulations, analyses are carried out to determine the influence of the perturbations of the terrestrial gravitational field, the solar radiation pressure and the lunissolar gravitational force, besides checking the combination of these perturbations, evaluating which of the effects presents predominance. (paper)