Explanation:

• Launched in 2013, the GSAT 7 series satellites are advanced satellites developed by the Indian Space Research Organisation (ISRO). They were developed to meet the communication needs of the defence services, which include low-bit voice rate to high-bit-rate data facilities, including multi-band communications. GSAT-7B satellite has a footprint of nearly 2,000 nautical miles in the Indian Ocean region. Rukmini - Named Rukmini, the satellite is mainly used by the Indian Navy for its communication needs.
•  It carries payloads in UHF, C-band, and Ku-band, and helps the Navy to have a secure, realtime communication link between its land establishments, surface ships, submarines, and aircraft.
• The satellite was injected into a geosynchronous transfer orbit (GTO). Currently, the Indian Army is using 30% of the communication capabilities of the GSAT7A satellite, which has been designed for the Indian Air Force (IAF). So, GSAT 7B will primarily fulfill the Army’s communication needs. It will also help the Army enhance its surveillance in border areas.