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isro: Isro successfully launches navigation satellite IRNSS-1I to replace faulty IRNSS-1A | India News

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NEW DELHI/BENGALURU: The successful launch of PSLV-C41 rocket carrying India’s eighth navigation satellite IRNSS-1I from Sriharikota at 4.04am on Thursday brought smile back on the faces of scientists of Indian Space Reserach Organisation (Isro) amid tough time when the space agency is struggling to restore the snapped link with its recently launched communication satellite Gsat-6A.

The textbook launch of PSLV-C41 took place in four stages and the total time taken for the rocket to put the satellite into the intended orbit was 19 minutes.

Navigation satellite IRNSS-1I has been launched to replace India’s first navigation satellite IRNSS-1A, whose three Rubidium atomic clocks had stopped working two years ago. The malfunctioning of the Europe-imported atomic clocks in IRNSS-1A made it difficult to measure precise locational data from the satellite. When the time signal is missing, getting true positional accuracy becomes a problem. Therefore, Isro felt a need to replace faulty satellite IRNSS-1A.

IRNSS-1I weighing 1,425kg and with a life span of 10 years has become the eighth satellite to join the constellation of navigation satellites called NavIC (Navigation with Indian Constellation) or popularly known as IRNSS or ‘desi’ GPS.

Updated: April 12, 2018 — 1:50 am

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