PSLV Launches IRNSS-1E


New Delhi: PSLV-C31 successfully launched IRNSS-1E, the fifth satellite of the Indian Regional Navigation Satellite System, from the Satish Dhawan Space Centre (SDSC), SHAR, Sriharikota on Wednesday morning.

PSLV-C31 for the eleventh time, used ‘XL’ version of PSLV. IRNSS-1E with a lift-off mass of 1425 kg carried navigation payload and ranging payload, according to an ISRO release.

Some 19 minutes after it lifted off from Second Launch Pad of the Satish Dhawan Space Centre here at 9.31 am, the XL version of the PSLV rocket placed the 1,425 kg satellite (ground mass) into the precise orbit in a text-book launch, which is also the first launch for ISRO this year.

“PSLV C-31 rocket has successfully launched IRNSS-IE satellite in orbit,” ISRO chairman A.S. Kiran Kumar said.

However, many people waiting to watch the launch were disappointed, as the sky remained cloudy and they could catch only a glimpse of the soaring rocket for very few seconds.

The configuration of IRNSS-1E is similar to that of IRNSS-1A, 1B, 1C and 1D launched by PSLV-C22, PSLV-C24, PSLV-C26 and PSLV-C27 in July 2013, April 2014, October 2014 and March 2015 respectively.

The ranging payload of IRNSS-1E consists of a C-band transponder which facilitates accurate determination of the range of the satellite. IRNSS-1E also carries Corner Cube Retro Reflectors for laser ranging.

In addition to the deployment of the constellation of seven satellites in space, the ground segment comprising 13 Indian Range and Integrity Monitoring Stations, a IRNSS Network Timing Centre, a ISRO Navigation Centre and a Space Control Facility would also be established.

An independent regional navigation satellite system, developed by India, IRNSS is designed to provide accurate position information service to users in India as well as the regional extending upto 1,500 km from its boundary.

The system is expected to provide a position accuracy of better than 20 metre in the primary service area. IRNSS would have seven satellites in space and the ground segment.