ISRO will launch three communication satellites — GSAT-19, GSAT-11 and GSAT-20 — in the next 18 months to boost internet across India. High-throughput satellites have been a gamechanger in the developed countries, providing Internet connectivity many times faster, smoother and cheaper. The effective data rate of GSAT satellites is one gigabyte per second. GSAT-19 will be able to transfer data at four gigabyte per second, thus making it equivalent to four satellites,”said Tapan Misra, director of Ahmedabad-based Space Applications Centre (SAC), an arm of ISRO that develops satellite payloads. “One of the heaviest satellites ever to be built by ISRO — GSAT-11 — is scheduled to be launched in January 2018. It will have a data rate of 14 gigabyte per second. We plan to launch GSAT-20 by the end of next year. We plan to cover the entire nation with a satellite that will offer a data rate of 70 gigabyte per second. This is in sync with the requirement of high data-rate transmission needed by smart cities,” the ISRO scientist said.