comscore India's 7th navigation satellite launch is on schedule to take off tomorrow
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India's 7th navigation satellite launch is on schedule to take off tomorrow

ISRO has confirmed that the seventh navigation satellite is on schedule to take off tomorrow and the preparations are progressing well.

  • Updated: April 27, 2016 1:15 PM IST
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The 51 hour, 30 minute countdown for the launch of an Indian rocket with the country’s seventh navigation satellite scheduled for Thursday is proceeding normally, the Indian Space Research Organisation (ISRO) said on Wednesday. According to the ISRO, the progressing status of the countdown for the launch of 44.4 metre, 320 tonne Polar Satellite Launch Vehicle (PSLV) carrying Indian Regional Navigation Satellite System-IRNSS-1G is expected to blast off at 12.50 p.m. on Thursday. Also Read - Starlink satellite broadband service faces challenge in India, Elon Musk led company questioned

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Just over 20 minutes into the flight, the rocket is expected to put into orbit the 1,425-kg IRNSS-1G satellite at an altitude of 497.8 km. The PSLV rocket is a four stage/engine rocket powered by solid and liquid fuel alternatively. The satellite with a design life span of 12 years has two payloads for navigation and ranging. The navigation payload of IRNSS-1G 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.

The ranging payload of IRNSS-1G consists of a C-band transponder (automatic receivers and transmitters of radio signals) which facilitates accurate determination of the range of the satellite. According to ISRO the applications of IRNSS are: terrestrial, aerial and marine navigation, vehicle tracking and fleet management, terrestrial navigation for hikers and travellers, disaster management, integration with mobile phones, mapping and geodetic data capture and visual and voice navigation for drivers.

Apart from the civilian usage, the IRNSS will be used for defence purposes as well. Till date, India has launched six regional navigational satellites (IRNSS-1A, 1B, 1C, ID,1E and 1F) as part of a constellation of seven satellites to provide accurate position information service to users across the country and the region, extending up to an area of 1,500 km.

Though the full system comprises nine satellites — seven in orbit and two on the ground as stand-by, the navigation services could be made operational with four satellites, ISRO officials had said earlier. Each satellite costs about Rs 150 crore and the PSLV-XL version rocket costs about Rs 130 crore. The seven rockets would entail an outlay of about Rs 910 crore. If everything goes successful then the entire IRNSS constellation of seven satellites will be completed on Thursday.

ALSO READ: ISRO to launch record 22 satellites in single mission by May 2016

The first satellite IRNSS-1A was launched in July 2013, the second IRNSS-1B in April 2014, the third on October 2014, the fourth in March 2015, and the fifth and sixth on January 20 and March 10, 2016. Once the regional navigation system is in place, India need not be dependent on other platforms. According to ISRO, with the operationalization of six IRNSS satellites, the proof of concept of an independent regional navigation satellite system over India has been demonstrated for the targeted position accuracy of better than 20 metres over 24 hours of the day.

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  • Published Date: April 27, 2016 1:10 PM IST
  • Updated Date: April 27, 2016 1:15 PM IST



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