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Satellite Updates : ISRO to launch 7th navigation satellite on April 28 ( Launched)
#1
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ISRO to launch 7th navigation satellite on April 28; complete India’s satellite navigation system


India is slated to put into orbit its seventh and final navigation satellite on April 28, thereby having its full satellite navigation system up in the sky, said a senior space agency official. “The launch of India’s seventh and the final in the series of satellites will be on April 28 afternoon. The IRNSS-1G (Indian Regional Navigation Satellite System-1G) will be put into orbit by our rocket Polar Satellite Launch Vehicle (PSLV),” K.Sivan, director, Vikram Sarabhai Space Centre of the Indian Space Research Organization (ISRO), told IANS.

The PSLV rocket will blast off after 12 noon on April 28 from India’s spaceport at Sriharikota in Andhra Pradesh. 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 while the PSLV-XL version rocket costs about Rs 130 crore. The seven rockets would entail an outlay of about Rs 910 crore.

The first satellite, IRNSS-1A, was launched in July 2013, the second in April 2014, the third on October 2014, the fourth in March 2015, and the fifth and sixth on January 20 and March 10 this year. Once the regional navigation system is in place, India need not be dependent on other platforms.

The IRNSS is similar to the global positioning system (GPS) of the US (24 satellites), Glonass of Russia, and Galileo of Europe as well as China’s BeiDou. While GPS and Glonass are fully functional global systems, the Chinese and the Japanese systems are offering regional coverage and Europe’s Galileo is yet to be operational.

The IRNSS will provide two types of services — standard positioning service and restricted service. The former is provided to all users and the latter is an encrypted service for authorized users. Meanwhile ISRO is in the process of developing the front-end radio frequency chips for the satellite navigation system. The initial version is expected to be ready this year, ISRO chairman A.S. Kiran Kumar told IANS.

http://www.bgr.in/news/isro-to-launch-7t...on-system/
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#2
Isro Begins Countdown for Launch of Final IRNSS Navigation Satellite


The 51.30 hour countdown for the launch of India's seventh and final navigation satellite on April 28 afternoon begun at 9:20am on Tuesday at Sriharikota rocket port of Indian Space Research Organisation (Isro), said a senior official.

"The countdown started at 9:20am. The rocket PSLV-XL (polar satellite launch vehicle) will blast off from the first launch pad at 12:50pm on April 28," P. Kunhikrishnan, director, Satish Dhawan Space Centre (SDSC), Sriharikota told IANS over phone.

The rocket port is in Andhra Pradesh, around 80km from in Sriharikota.

He said the countdown is progressing normally.

The satellite IRNSS-1G (Indian Regional Navigation Satellite System-1G) is 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 1,500km.

Till date, India has launched six regional navigational satellites (IRNSS-1A, 1B, 1C, ID, 1E and 1F).

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 said earlier.

Each satellite costs about Rs. 150 crores while the PSLV-XL version rocket costs about Rs. 130 crores. The seven rockets would entail an outlay of about Rs. 910 crores.

The first satellite, IRNSS-1A, was launched in July 2013, the second in April 2014, the third on October 2014, the fourth in March 2015, and the fifth and sixth on January 20 and March 10 this year.

Once the regional navigation system is in place, India needs not depend upon other platforms.

The IRNSS is similar to the global positioning system (GPS) of the US (24 satellites), Glonass of Russia, and Galileo of Europe as well as China's Beidou.

While GPS and Glonass are fully functional global systems, the Chinese and the Japanese systems are offering regional coverage and Europe's Galileo is yet to be operational.

The IRNSS will provide two types of services - standard positioning service and restricted service. The former is provided to all users and the latter is an encrypted service for authorised users.

Meanwhile Isro is in the process of developing the front-end radio frequency chips for the satellite navigation system. The initial version is expected to be ready this year, Isro chairman A.S. Kiran Kumar told IANS earlier.

http://gadgets.ndtv.com/science/news/isr...ite-830201
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#3
Isro Successfully Launches Final IRNSS Navigation Satellite

ISRO said its Polar Satellite Launch Vehicle (PSLV) rocket lifted off successfully on Thursday afternoon with the country's seventh and final navigation satellite, IRNSS-1G, from the rocket port in Sriharikota.

The PSLV-XL standing 44.4 metre tall and weighing 320 tonnes, tore into the afternoon skies at 12.50 p.m. breaking free of the earth's gravitational pull.

Named the Indian Regional Navigation Satellite System (IRNSS), it consists of a constellation of seven satellites of which six - IRNSS-1A, IRNSS-1B, IRNSS-1C, IRNSS-1D, IRNSS-1E and IRNSS-1F- have already been put into orbit.

The seventh satellite in the series - IRNSS-1G - weighing 1,425 kg is expected to soon join the other six.

Just over 20 minutes into the flight, the rocket would put IRNSS-1G into orbit at an altitude 497.8 km.

The satellite's life span is 12 years.

Prime Minister Narendra Modi also congratulated Indian space scientists after a successful launch of the country's seventh navigation satellite that blasted off from the spaceport of Sriharikota.

"Our scientists have achieved many accomplishments. Through space science, lives of people can be transformed. India has launched seven navigation satellites which have been successful," he said in a televised address.

He said the successful launch of the satellite, which guarantees India's indigenous satellite navigation system, was a "precious gift by Indian scientists to the people of the country".

"Our efforts will not only help India but can help fellow Saarc nations as well," Modi said.

http://gadgets.ndtv.com/science/news/isr...ite-831187
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