The countdown began at 9.26 AM after the launch authorisation board (LAB) gave the clearance for the mission yesterday and the process of filling the fuel was underway, the Indian Space Research Organisation (ISRO) said.
After creating a record in 2008 for placing 10 satellites into various low earth orbits in a single launch, ISRO is all set for the new record of launching 20 satellites, including those from the US, Germany, Canada and Indonesia.
India's earth observation spacecraft Cartosat-2 Series satellite, which is similar to the earlier Cartosat-2, 2A and 2B, and 19 co-passenger satellites together weighing about 560 kg at lift-off would be injected into a 505 km polar Sun Synchronous Orbit.
According to ISRO, the total weight of all the 20 satellites is about 1,288 kg.
The co-passengers include satellites from the US, Canada, Germany and Indonesia as well as two satellites from Indian Universities.