Ahead of landmark 100th launch, ISRO chief offers prayers at Tirumala temple for GSLV-F15 success Tirumala, January 28: Ahead of the GSLV-F15/ NVS-02 rocket launch scheduled for Wednesday, ISRO Chairman Dr. V. Narayanan, along with a team of scientists, visited Lord Venkateswara temple in Tirumala...