Figure 1 provides the context in which the SSCS is intended for use. The SSCS is an integral part of satellite operations for the overall satellite control process. It is capable of performing all State-of-Health (SOH) related operations for a wide range of satellites. Other elements of the Mission Control Segment are mission applications and systems services to be used by all applications.
External to the Mission Control Segment are the components of Network Operations, namely the Range, Communications, and Resource Management Segments. These segment provide the antennas used to track satellites, the communications equipment needed for TT&C activities, and certain centralized resource scheduling and resource management functions, respectively.
The SSCS functional areas described in this architecture include mission planning, telemetry processing, satellite commanding, orbit data processing, and attitude data processing. These are marked with check () in Figure 1. Simulation and resource management are not discussed (except certain ground system status processing) because these functions depend on the specific needs of the operational environment and final implementation of the hardware and software. In addition, neither function is seen as a performance driver in this architecture.
It should be emphasized that this architecture is not a precise representation of the common core TT&C system. This is because, at the time of this publication, the core TT&C definition was still in flux. Hence, a stable requirements baseline was chosen and frozen for this analysis. This requirements baseline is likely to be a superset of the core requirements in the five functional areas described, but it will not include certain resource management and simulation functions that may be part of the core.