The Indian Space Research Organisation (ISRO) is all set to launch the country's heaviest communication satellite CMS-03 on Sunday. The CMS-03 is a multi-band military communication satellite, also known as GSAT-7R, and will be launched aboard the Launch Vehicle Mark 3 (LVM3), the country's most powerful rocket. The launch is scheduled to take place on November 2, from the Satish Dhawan Space Centre, Sriharikota in Andhra Pradesh.