Chennai, Jan. 28 -- The 27 hr countdown for tomorrow's historic GSLV-F15/NVS-02 Mission, marking ISRO's 100th Launch from the spaceport of Sriharikota, began on Tuesday morning.

ISRO sources said the countdown for the launch began at 0327 hrs.

NVS-02 is Navigation Satellite and second in the series of NavIC constellation.

The GSLV-F15 will take off from the Second Launch Pad (SLP) at 0623 hrs tomorrow morning.

During the Countdown propellant filling operations will be carried out in the three stage vehicle, including the indigenous cryogenic third stage.

"'GSLV-F15 integration complete! Take a sneak peek at the incredible teamwork behind this mission: Join us as we unlock new frontiers,' ISRO said.

This launch will herald yet anothe...