Field command of a tactical satellite system

A study to evaluate the feasibility of field command of a notional tactical imaging satellite system is presented. Such a system is deemed feasible, and the utilization of GPS receivers on the spacecraft, more satellite autonomy, and a greater tolerance for individual space vehicle failures can lower the work load to manageable levels for ground-base controllers. Current tracking, telemetry, and control schemes were evaluated to determine the minimum elements required for successful field satellite command. The system selected consists of a constellation of satellites at 500 km altitude, with a 700 km swath width. It is noted that two possible design enhancements that would lower satellite dependency on complex ground based control networks and thereby enhance spacecraft autonomy are improved fault management systems and independent satellite navigation systems.