The Global Broadcast Service (GBS) is a combined United States space and Command, Control, Communications, and Intelligence (C3I) system, that provides a one-way Wideband/high-Throughput of information to forces garrisoned, deployed, or on the move. An advancement in satellite communications, GBS fills the two key Military communications requirements: 1) high data rates to many users at once; and 2) high data rates to very small, low-cost user receive-only terminals. GBS consists of Transmit Sites (TS), Broadcast satellite payloads, and receive suites (RS).
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Global Broadcast Service Wikipedia(Text) CC BY-SA