Indian space agency ISRO on Wednesday launched its work-horse Polar Satellite Launch Vehicle, PSLV-C31, successfully carrying the 1425 kg IRNSS-1E, the fifth satellite in the Indian Regional Navigation Satellite System (IRNSS) from Satish Dhawan Space Centre (SHAR) in Sriharikota, Andhra Pradesh.
PSLV’s 32nd consecutive successful mission and the eleventh in its ‘XL’ configuration, lifted off at 0931 hrs (9:31 am) IST from the Second Launch Pad with the ignition of the first stage, the subsequent important flight events, namely, strap-on ignitions and separations, first stage separation, second stage ignition, heat-shield separation, second stage separation, third stage ignition and separation, fourth stage ignition and satellite injection, took place as planned.
After a flight of about 18 minutes 43 seconds, IRNSS-1E Satellite was injected to an elliptical orbit of 282.4 km X 20,655.3 km inclined at an angle of 19.21 degree to the equator and successfully separated from the PSLV fourth stage. After injection, the solar panels of IRNSS-1E were deployed automatically and ISRO’s Master Control Facility at Hassan, Karnataka took over the control of the satellite.
Once the ground control carries out its planned four orbit manoeuvres from the Master Control Facility to position the satellite in the Geosynchronous Orbit at 111.75 deg East longitude with 28.1 deg inclination, the satellite will begin its operations sending signals.
IRNSS-1E is the fifth of the seven satellites constituting the space segment of the Indian Regional Navigation Satellite System. IRNSS-1A, 1B, 1C and ID, the first four satellites of the constellation, were successfully launched by PSLV on July 02, 2013, April 04, 2014, October 16, 2014 and March 28, 2015 respectively. All the four satellites are functioning satisfactorily from their designated orbital positions.
IRNSS provides global position information (GPS) in the Indian region and 1500 km around the Indian mainland in the form of Standard Positioning Services (SPS) – provided to all users – and Restricted Services (RS), provided to Indian defence needs.
A number of ground stations responsible for the generation and transmission of navigation parameters, satellite ranging and monitoring, etc., have been established in eighteen locations across the country. There are two more satellites pending for the IRNSS program — IRNSS-1F and IG — which are scheduled to be launched by PSLV by 2017, thereby completing the entire IRNSS constellation.[category, science] [tags, isro, pslv c31, irnss, satellite launch, gps, navigation satellite, irnss-1e, xl configuration, pslv series]