The IRNSS-1I launch is ISRO's second attempt at sending a replacement satellite for the NAVIC system.New Delhi:  While most of India slept, ISRO's Polar Satellite Launch Vehicle or PSLV blasted off into space from Sriharikota off the coast of Andhra Pradesh at 4:04 am today, carrying IRNSS-1I, the eighth satellite for India's homegrown global positioning system.

The successful launch came just 14 days after the much larger Geosynchronous Satellite Launch Vehicle or GSLV rocket launch on March 29 spelled a setback for the space agency as the Rs 270 crore GSAT 6A that it was carrying was lost to a systems failure.

Thursday's launch created history for ISRO, becoming the fastest back-to-back launch in the agency's history.