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with a despun communications and antenna section. They were made with a solid rocket motor for initial perigee burn and hydrazine propellant for station keeping and spin stabilization. The communications systems offers a wideband UHF channel (500 kHz bandwidth), six relay 25 kHz channels, and five narrowband 5 kHz channels. This is in addition to the fleet broadcast frequency, which is in the military's X-band. The system was used by military customers in the US and later in Australia. Most of

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