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"Seven S-band and Ku-band channels. The 1,148-kg spacecraft will provide TV and data communications links between the International Space Station and the ground, as well as orbital control of spacecraft in low Earth orbit."
"Relay commands and data. Provide secure communication links, command relay to spacecraft, and communication with ISS. Time correction for GLONASS."
"Relay commands and data. Provide secure communication links, command relay to spacecraft, and communication with ISS. Time correction for GLONASS."