Sriharikota: PSLV-C39 Carrying IRNSS-1H Series Satellite For Navigation Related Applications To Be Launched Today

According to ISRO officials, the total cost of all the� seven satellites was Rs 1,420 crore. (Image: isro.gov.in)

ISRO had launched seven satellites - IRNSS-1G on April 28, 2016, IRNSS-1F (March 10, 2016), IRNSS-1E (January 20, 2016), IRNSS-1D (March 28, 2015), IRNSS-1C (October 16, 2014), IRNSS-1B (April 4, 2014) and IRNSS-1A on July 1, 2013. (Image: isro.gov.in)

New Delhi: The countdown for Thursday's launch of navigation satellite 'IRNSS-1H' to augment the existing seven satellites of the NavIC constellation has begun. To be launched on board PSLV-C39, IRNSS-1H will be a 'back-up' navigation satellite for IRNSS-1A, one of the seven satellites in the constellation, as its three rubidium atomic clocks on board had stopped functioning. (Image: Twitter)

The system that offers services like terrestrial and marine navigation, disaster management, vehicle tracking and� fleet management, navigation aide for hikers and travellers, visual and voice navigation for drivers, was named 'NavIC' (Navigation with Indian Constellation) by Prime Minister Narendra Modi. (Image: isro.gov.in)

The over 1,400 kg spacecraft was built and tested by ISRO along with a consortium of six small and medium industries. The Indian Regional Navigation Satellite System (IRNSS) is an independent regional navigation satellite system developed by India on par with US-based GPS. (Image: isro.gov.in)

The Mission Readiness Review (MRR) committee and Launch Authorisation Board (LAB) had on Tuesday cleared the 29-hour countdown. The launch vehicle PSLV-C39 will use the 'XL' version of PSLV equipped with six strap-ons, each carrying 12 tons of propellant. (Image: isro.gov.in)

"The 29-hr countdown operations of PSLV-C39/IRNSS-1H mission have started on Wednesday at 14:00 hrs IST," the Indian Space Research Organisation said. The launch is scheduled at 19:00 Hrs from the Second Launch Pad of the Satish Dhawan Space Centre at Sriharikota in Andhra Pradesh. (Image: isro.gov.in)