India's latest communication satellite GSAT-15 was launched on board Arianespace rocket from the space port of Kourou in French Guiana early this morning. Weighing 3,164 kg at lift-off, GSAT-15 is a high power satellite being inducted into the INSAT/GSAT system. ISRO said, it carries a total of 24 communication transponders in Ku-band as well as a GPS-Aided GEO Augmented Navigation (GAGAN) payload operating in L1 and L5 bands.<br/><br/>GSAT-15 is the third satellite to carry GAGAN payload after GSAT-8 and GSAT-10, which are already providing navigation services from orbit. It also carries a Ku-band beacon as well to help in accurately pointing ground antennas towards the satellite.<br/><br/>GSAT-15 will be the 19th payload launched by Arianespace for ISRO.