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ISRO satellite IRNSS-1H: PSLV launch unsuccessful. Watch video

This was India's eighth navigation satellite, meant to be established into a sub Geosynchronous Transfer Orbit with the help of PSLV-C39 rocket.

BT Online        Last Updated: August 31, 2017  | 20:17 IST
ISRO satellite IRNSS-1H: PSLV launch unsuccessful. Watch video
Pic: ISRO

The launch of Indian Regional Navigation Satellite System (IRNSS-1H) by the Indian Space Research Organisation (ISRO) was unsuccessful. This was India's eighth navigation satellite, meant to be established into a sub Geosynchronous Transfer Orbit with the help of PSLV-C39 rocket.

The 1425-kg satellite was meant to expand the existing seven satellites of India's NavIC constellation. The launch, which was scheduled at 7:00 pm today, was the 41st launch of the PSLV (Polar Satellite Launch Vehicle).

"We had a problem. We will do a detailed analysis," ISRO chief Kiran Kumar was quoted saying in a PTI alert.

The launch took place from the Second Launch Pad (SLP) of Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota. As in the previous six launches of IRNSS satellites, PSLV-C39 used the 'XL' version of PSLV equipped with six strap-ons, each carrying 12 tons of propellant.

Named by Prime Minister Narendra Modi, 'NavIC' or Navigation with Indian Constellation 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.

Like its other IRNSS predecessors, IRNSS-1H also carried two types of payloads - navigation payload and ranging payload. The navigation payload of IRNSS-1H will transmit navigation service signals to the users. Highly accurate Rubidium atomic clocks are part of the navigation payload of the satellite.

The Indian Regional Navigation Satellite System (IRNSS) is an independent regional navigation satellite system developed by India on par with US-based GPS. According to ISRO officials, the total cost of all the seven satellites was Rs 1,420 crore.

While IRNSS-1H joins the constellation for providing navigation services, IRNSS-1A will be used for messaging services. IRNSS 1H comes with more flexibility in service and it is compatible with the satellites, which are in orbit, ISRO said.

The 29 hours countdown operations of PSLV-C39/IRNSS-1H mission started on Wednesday, August 30, 2017 at 14:00hr IST. The over 1,400 kg spacecraft was built and tested by ISRO along with a consortium of six small and medium industries.

According to ISRO, NavIC is useful for fishermen to reach the potential fishing area. The fishermen can also get alert messages relating to bad weather, high waves or when they approach international maritime boundary line. The navigation system will also be helpful for railways in tracking trains and also giving an alert in the case of unmanned level crossing.

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