Information warfare is a cornerstone of Joint Vision 2010 which addresses the future strategic environment for the United States. An integral component of information warfare is the continuing development of joint space doctrine. The Joint Warfare System (JWARS) is a large scale, systemic simulation being developed by the Joint Warfare Systems Office to aid in the evaluation of future joint doctrine and force structure. The purpose of this thesis is to develop and demonstrate Simulation of Satellite Communications (SIMSATCOM), a high resolution, stochastic simulation of satellite communications for evaluating the effectiveness of message transmission and receipt by specified senders and receivers. SIMSATCOM is designed to operate as a stand alone simulation, but may be adopted as a high resolution module for a large scale simulation such as JWARS. The thesis describes SIMSATCOM in detail and provides analyses of simulation runs for different jamming levels and channel capacities.