GSLV-F12 successfully places second gen. navigation satellite into intended orbit: ISRO
Sriharikota, (AP) (PTI): The Indian Space Research Organisation (ISRO) on Monday successfully launched a second generation navigation satellite, using a GSLV rocket with a cryogenic upper stage to do the job.
NVS-01 would augment the country's regional navigation system, providing accurate and real-time navigation.
At the end of a 27.5 hour countdown, the 51.7 metre tall, 3-stage Geosynchronous Satellite Launch Vehicle lifted off at a prefixed time of 10.42 am from the second launch pad at this spaceport, situated about 130 km from Chennai. This was GSLV's 15th flight.
The second generation navigation satellite series dubbed as a significant launch would ensure the continuity of NavIC (Navigation with Indian Constellation) services -- an Indian regional satellite navigation system, similar to the GPS, providing accurate and real-time navigation.
Signals from NavIC are designed to provide user position accurate to better than 20 metres and timing accuracy better than 50 nanoseconds.
ISRO Chairman S Somanath congratulated the entire team for the "excellent outcome" of the mission.
"NVS-01 has been placed in precise orbit by GSLV. Congratulations to the entire ISRO team for making the mission happen," he said in his post-launch address from the Mission Control Center.
Today's success came after the GSLV F10 'debacle,' he said referring to the anomaly in the cryogenic stage of the launch vehicle in August 2021, following which the then mission could not be realised.
He expressed joy that "corrections in cryogenic stage and lessons learnt have really paid benefits" and credited the Failure Analysis Committee for addressing the problem.
Somanath further said NVS-01 is a second generation satellite with additional capabilities. The signals will be more secure, civilian frequency band has been introduced, he said. This was one of the five of such satellites.
The rocket, a little short of 20 minutes after it took off, deployed the 2,232 kg satellite into the intended Geosynchronous Transfer Orbit (GTO) at an altitude of about 251 km.
NVS-01 carried navigation payloads L1, L5 and S bands and the second generation satellite also has an indigenously developed rubidium atomic clock.
It is for the first time that an indigenously developed rubidium atomic clock has been used as the scientists earlier opted for imported ones to determine date and location.
Ahmedabad-based Space Applications Centre has developed the clock, and according to ISRO, it assumes significance as it is an important technology that only a handful of countries possess.
ISRO developed the NavIC system to meet the positioning, navigation and timing requirements of the country, particularly with regard to civil aviation and military requirements.
NavIC was earlier known as the Indian Regional Navigation Satellite System (IRNSS).
"The L1 navigation band is popular for providing position, navigation and timing services for civilian users and for interoperability with other GNSS (global navigation satellite system) signals," ISRO said.
Some of the applications of NavIC include terrestrial, aerial and maritime navigation, precision agriculture, location-based services in mobile devices and marine fisheries, among many others.
NavIC offers two services -- Standard Position Service (SPS) for civilian users and Restricted Service for strategic users.
NavIC SPS signals are interoperable with the US global navigation satellite system signals, GPS, Glonass from Russia, Galileo (European Union) and BeiDou, China.
Monday's mission is the sixth operational flight of the GSLV with indigenous cryogenic stages. The mission life of NVS-01 is expected to be better than 12 years, ISRO said.
ISRO has already launched similar navigation satellites--IRNSS-1A,IRNSS-1B,IRNSS-1C, IRNSS-1D, IRNSS-1E,IRNSS-1F,IRNSS-1G, IRNSS-1H and IRNSS-1I.
Of these missions, IRNSS-1H was not successful as the satellite could not be placed into orbit. It was replaced by IRNSS-1I which was successfully launched on April 12, 2018.
VIDEO | ISRO successfully places navigation satellite NVS-01 into geosynchronous transfer orbit. GSLV-F12 rocket, carrying the satellite, lifted off from Satish Dhawan Space Centre, Sriharikota High Altitude Range. pic.twitter.com/mvVg6IHFeF
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Sonia, Kharge, Rahul, Akhilesh join opposition leaders in protest against SIR
New Delhi (PTI): Several MPs of the INDIA bloc parties, including Congress chief Mallikarjun Kharge and Congress parliamentary party chairperson Sonia Gandhi, protested in the Parliament House complex on Monday against the Election Commission's voter roll revision in Bihar, and demanded its rollback.
Ahead of the day's proceedings in Parliament, top opposition MPs, including Sonia Gandhi, Kharge, Leader of Opposition in the Lok Sabha Rahul Gandhi, Congress general secretary Priyanka Gandhi Vadra, Samajwadi Party's Akhilesh Yadav, TMC's Derek O'Brien and Sagarika Ghose, DMK's Kanimozhi and A Raja, besides others, raised slogans and protested against the Special Intensive Revision (SIR) of electoral rolls in Bihar.
There was a huge banner in front of them which read 'SIR- Attack on Democracy' as they lined up on and near the steps of the Makar Dwar of Parliament and staged a protest for the fifth consecutive day.
With 'Stop SIR' placards in hand, several MPs of the opposition, including those of the Congress, DMK, TMC, Samajwadi Party, RJD and Left parties, participated in the protest and raised slogans.
The opposition has been protesting in both Houses of Parliament against the SIR, alleging the EC's exercise was aimed at "disenfranchising voters" in Bihar ahead of the Assembly elections. They have been demanding a discussion on the issue in both Houses.
On Friday, several MPs of the INDIA bloc parties, including Kharge and Rahul Gandhi, had held an unusual protest in the Parliament House complex against the voter roll revision in Bihar by tearing posters with 'SIR' written on them and putting them in a 'disposal bin'.
They had also staged a protest march in the complex, demanding the rollback as well as a discussion on the issue in both Houses.
