space segment (SS)
Space Segment (SS) is a term from satellite transmission and describes the orbital assignment of satellites.
The space segment includes the number of active satellites and reserve satellites of a satellite system, the orbital parameters such as the trajectories, orbital altitude and orbital periods, all technical equipment such as transponders, receivers and directional antennas, and the satellite bands. Space segments send their signalsdownlink to the ground segment. In satellite communications, the ground segments transmit in the uplink to the space segments.