Indian Regional Navigational Satellite System:
The 67-hour countdown for the launch of India’s navigation satellite
IRNSS 1C, the third of seven satellites in the series to put in place
India’s navigation system on par with US’ Global Positioning System, on
board PSLV C 26 began on Monday at the spaceport of Sriharikota.
Following the clearance from the Launch Authorisation Board (LAB),
the countdown commenced at 6.32 AM on Monday as planned and was
proceeding smoothly, ISRO said.
Based on the mission requirements, the launch window is 01:32 AM to
01:47 AM (IST) on October 16. The lift-off is scheduled at the opening
of the launch window at 1.32 AM, the national space agency had earlier
announced.
The earlier planned launched on October 10 was postponed due to some technical reasons.
IRNSS 1C with a lift-off mass of 1,425.4 kg would be shot into a sub Geosynchronous Transfer Orbit (sub GTO).
What for IRNSS is launched ??
As part of its aspirations to build a regional navigational system
equivalent to Global Positioning System of the US, ISRO plans to send
seven satellites to put in place the Indian Regional Navigational
Satellite System (IRNSS).The first two satellites in the series, IRNSS 1A and IRNSS 1B were
launched from Sriharikota on July 1, 2013 and April 4 this year
respectively.
ISRO needs to launch at least four of the seven satellites to start operations of the IRNSS, ISRO officials said.
Being developed by India, IRNSS is designed to provide accurate
position information service to users in the country as well as the
region extending upto 1,500 km from its boundary, which is its primary
service area.
IRNSS’s applications include terrestrial and marine navigation, disaster management, vehicle tracking and fleet management.
IRNSS is similar to US’ Global Positioning System, Russia’s Glonass
and Europe’s Galileo. China and Japan also have similar systems – Beidou
and Quasi Zenith.