1. PSLV-C31 successfully launched IRNSS-1E satellite
i. The Indian Space Research Organisation (ISRO) on 20 January 2016 successfully launched the Indian Regional Navigational Satellite System (IRNSS) 1-E satellite. The satellite will provide navigation, tracking and mapping services to the Indian sub continent.
ii. The satellite is the fifth of the IRNSS constellation. It was launched from the Satish Dhawan Space Centre (SHAR), Sriharikota in Andhra Pradesh on-board the PSLV-C31. The Polar Satellite Launch Vehicle (PSLV)-C31 was the 32nd consecutively successful mission of the PSLV. The ‘XL’ configuration of PSLV was used for this mission.
iii. This is the eleventh time ‘XL’ configuration was flown, earlier ten being PSLV-C11/Chandrayaan-1, PSLV-C17/GSAT-12, PSLV-C19/RISAT-1, PSLV-C22/IRNSS-1A, PSLV-C25/Mars Orbiter Spacecraft, PSLV-C24/IRNSS-1B, PSLV-C26/IRNSS-1C, PSLV-C27/IRNSS-1D, PSLV-C28/DMC-3 and PSLV-C30/ASTROSAT missions.
iv. IRNSS-1E, weighing 1425 kg, is the fifth of the seven satellites constituting the IRNSS. IRNSS-1A, 1B and 1C and 1D, the first four satellites of the constellation, were successfully launched by PSLV in July 2013, April 2014, October 2014 and March 2015 respectively.
v. 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.
vi. It is an independent regional navigation satellite system designed to provide position information in the Indian region and 1500 km around the Indian mainland. It would provide two types of services, namely, Standard Positioning Services (SPS), which will be provided to all users, and Restricted Services (RS) that will be provided to authorised users only.