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The fourth Indian satellite IRNSS-1D to be launched soon

New Delhi: Indian Space Research Organisation (ISRO) is setting up Indian Regional Navigation Satellite System (IRNSS) to provide positioning and navigational services in Indian mainland and surrounding region up to 1500 Km. IRNSS consists of seven satellites in a constellation, three satellites in geostationary orbit and four satellites in geosynchronous orbit. The objective of IRNSS is to provide positioning services over Indian region with an absolute position accuracy of better than 20 metres. IRNSS provides two services namely Standard Positioning Service (SPS) for Civilian users and Restricted Service (RS) for strategic users. Out of the 7 satellites required in the constellation, three satellites namely, IRNSS-1A, 1B & 1C have already been successfully placed in the orbit. The fourth satellite IRNSS-1D is scheduled for launch during March 2015. The work on remaining three satellites is in progress. The associated ground segment for maintaining the satellites in orbit, monitoring the constellation status, correction of the orbital parameters and navigation data uploading is in place. This information was provided by MoS in the Prime Minister’s Office and Minister of State in the Ministry of Personnel, PG & Pensions, Dr Jitendra Singh in a reply to unstarred question in the Lok Sabha today. Test flight of Reusable Launch Vehicle shortly Indian Space Research Organisation (ISRO) will carry out a test flight of Reusable Launch Vehicle – Technology Demonstrator (RLV-TD) by second quarter of 2015. Technology Demonstrator winged body vehicle weighing 1.5T will be lofted to a height of 70 km using solid booster, thus attaining 5 times the speed of sound. Thereafter it will descend by gliding and splashing down into the sea. This test flight would demonstrate the Hypersonic aerodynamics characteristics, Avionics system, Thermal protection system, Control system and Mission management. Development of Reusable Launch Vehicles is a technical challenge and it involves development of many cutting edge technologies. The magnitude of cost reduction depends on development and realization of fully reusable launch vehicle and its degree of reusability. ISRO has taken steps to develop next generation launch vehicle GSLV MkIII, capable of launching 4 ton class communication satellites to Geo-synchronous Transfer Orbit, which would bring down the cost of satellite launches.

About Sanjay Trivedi

Sanjay Trivedi is honorary editor of Asia Times. He is senior Indian Journalist having vast experience of 25 years. He worked in Janmabhoomi, Vyapar, Divya Bhaskar etc. newspapers and TV9 Channel as well as www.news4education.com. He is serving as Media Officer in Gujarat Technological University, the university which controlling 440 colleges of Engineering, Management, Pharmacy & Architecture colleges in Gujarat.

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