BANGLORE, Apr 17:
Country’s first indigenously build satellite navigation spacecraft will be launched in June this year, Indian Space Research Organisation (ISRO) Chairman K Radhakrishna said today.
Talking to newsmen on the sidelines of a National Conference on ‘Applications and Challenges in Space Based Navigation’ here, he said in all seven Navigation Satellite will be launched within 18 months after June.
‘First Navigation Satellite built by Indian Regional Navigation Satellite System (IRNSS) of ISRO, will take six months to reach the orbit and produce the result. After the in orbit testing, remaining six Satellites will be launched with in 18 months period,’ he added.
Mr Radhakrishna said preparation was in full swing and the satellite would be shifted from ISRO satellite centre here to Sriharikota for launch soon.
India had entered into the arena of satellite navigation with its two major projects viz. Gagan (GPS Aided Geo Augmented Navigation), which is space-based augmentation for GPS developed jointly by ISRO and Airports Authority of India (AAI) and ISRO’s initiative IRNSS, India indigenous navigation system.
The IRNSS is a regional navigation system unlike the other Global Navigation Satellite Systems (GNSS) which now provide the highly precise positioning velocity and timing services to the busily moving human race on earth. The primary service area of IRNSS includes the Indian land mass and extends up to 1500 km from its geopolitical boundary.
The main objective of IRNSS is to provide its Primary Service Area a positioning service with an accuracy better than 20 m.
The space segment is constituted of seven satellites, three satellites in Geostationary Earth Orbits and four satellites in Geo-Synchronous Orbits with inclination of 29 degree to equatorial plane. All the satellites will be visible in service region for 24 hours and shall transmit navigation signals in both L5 and S band frequencies.
He said the space crafts weighing about 1425 kg will be launched on-board PSLV from Satish Dhawan Space Centre at Sriharikota.
Mr Radhakrishna said the IRNSS, being the first project of its kind in the country, demanded the development of various technologies that are being used for the first time in Indian space programme including Rubidium Atomic Frequency Standard (RAFS) on-board spacecraft, CDMA and LASER ranging to Geostationary orbit, Single/Dual frequency receivers and multi-signal receivers compatible with other services and Grid-based ionospheric model for Indian region. (UNI)
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