India’s Polar Satellite Launch Vehicle (PSLV) rocket blasted off successfully with the country’s fifth navigation satellite IRNSS-1E on from the rocket port at Sriharikota on Wednesday.
The 48-hour countdown for the lift of an Indian rocket — the first one for 2016 — with the country’s fifth navigation satellite as the sole passenger had begun at 9.31 a.m. on Monday.
Till date India has launched four regional navigational satellites (IRNSS-1A, 1B, 1C and ID) as part of a constellation of seven satellites to provide accurate position information service to users across the country and the region, extending up to an area of 1,500 km.
Though the full system comprises of nine satellites — seven in orbit and two on the ground as stand-by — the navigation services could be made operational with four satellites, ISRO officials had said earlier.
Each satellite costs around Rs.150 crore and the PSLV-XL version rocket costs around Rs.130 crore. The seven rockets would involve an outlay of around Rs.910 crore.
The entire IRNSS constellation of seven satellites is planned to be completed in 2016 itself.
The first satellite IRNSS-1A was launched in July 2013, the second IRNSS-1B in April 2014, the third on October 2014 and the fourth on March 2015.
Once the regional navigation system is in place, India need not be dependent on other platforms.
According to ISRO, IRNSS-1E carries two types of payloads — navigation and ranging payloads.
The navigation payload of IRNSS-1E will transmit navigation service signals to the users. This payload will be operating in L5-band and S-band.
A highly accurate Rubidium atomic clock is part of the navigation payload of the satellite.
The ranging payload of IRNSS-1E consists of a C-band transponder (automatic receivers and transmitters of radio signals) which facilitates accurate determination of the range of the satellite.
IRNSS-1E also carries Corner Cube Retro Reflectors for laser ranging.