Satellite system for tactical MILSATCOM applications

The communication requirements for continuous MILSATCOM service can be met by augmenting the current and planned MILSATCOM systems with a functionally simple, low-cost, maneuverable, user-dedicated satellite constellation for tactical applications (TACSAT) whose payloads are under direct control of the theater Commander in Chief (CINC). A perspective on moderately hardened, low-cost SHF and EHF satellites that have minimal impact on the ground infrastructure to satisfy such missions is presented. The communication and coverage requirements of the theater CINCs are discussed, followed by an SHF versus EHF comparison. Four different SHF payloads (including an enhanced DSCS replenishment) and two EHF payloads are evaluated. The spacecraft systems to integrate these payload options, including the spacecraft, launch vehicles, and ground segment, are addressed. Parametric trade studies of communication capacity and satellite life/maneuverability are presented. Ground segment operational scenarios based on a computer simulation of ground mobile forces (GMF) network for a given connectivity are presented. The various architectures proposed are analyzed and compared by generating a figure-of-merit unit per 1 MHz transponder capacity for each option