Chennai: India is set for the April 20 launch of the country’s latest remote sensing satellite Resourcesat-2 and two small spacecrafts on board PSLV C16 rocket from the Sriharikota spaceport, 90 km from here.

The 54-hour long countdown commenced at 4.12 AM on Monday after the Launch Authorisation Board for the mission gave its green signal at its meeting at Satish Dhawan Space Centre at Sriharikota on Saturday.

The ISRO built 1,206-kg RESOURCESAT-2 is an advanced remote sensing satellite to facilitate study and management of natural resources.

The 98 kg YOUTHSAT, an Indo-Russian satellite for stellar and atmospheric studies and 106 kg X-SAT, a microsatellite for imaging applications built by Nanyang Technological University Singapore, will also be placed in orbit.

The LAB cleared the launch of PSLV-C16 at 10:12 hrs on April 20 after reviewing readiness of the launch vehicle, spacecraft systems and ground stations, an Indian Space Research Organisation (ISRO) statement said on Sunday.

During countdown, propellant-filling operations of liquid propellant second stage (PS2) and fourth stage (PS4) of the launch vehicle will be carried out, ISRO said.

Mandatory checks on the launch vehicle and spacecraft - including charging of batteries and pressurisation of propellant tanks will also be performed, besides checking the readiness of launch infrastructure and communication networks.