European rocket Ariane-5 lifted off from the French Guyanese spaceport of Kourou in South America early Thursday, carrying the Indian Space Research Organisation's Insat-3A and Panamsat's Galaxy XII satellites.
The 2.95 tonne Indian satellite carries 24 transponders -- 12 in C band, 6 in Ku band and the rest in the upper extended C band.
The ISRO's Master Control Facility at Hassan in Karnataka, 160km from Bangalore, took control of the satellite after it was launched into transfer orbit.
The launch was planned for Wednesday. But ISRO scientists, stationed at the launch site, observed during the final checks on Tuesday that the signal strength from one of the two telemetry transmitters was less than nominal.
The takeoff was then postponed by a day.