December 3, 2023

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Assured that GSLV will launch NASA-ISRO satellite tv for pc NISAR subsequent yr: ISRO on GSLV-F12 success

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Springing again with a profitable launch of the GSLV rocket, after a failed launch of the identical rocket almost 22months in the past(GSLV-F10 on August twelfth, 2021), ISRO officers expressed confidence that the GSLV rocket will launch the NASA-ISRO joint mission NISAR in 2024. Launched from the second launchpad at Satish Dhawan House Centre, Sriharikota at 10:42 am, the 51.7meter tall car carried the two,232kg NVS-01 next-generation navigation satellite tv for pc right into a Geosynchronous Switch Orbit(GTO).

Within the coming days, the satellite tv for pc will likely be utilizing its onboard propulsion techniques to loft the satellite tv for pc into the supposed ultimate orbit. The NVS-01 satellite tv for pc has each civilian and army purposes. It’s notable that Indian Air Pressure Chief Air Chief Marshal VR Chaudhari and prime Indian Navy officers witnessed the launch from the Mission Management Centre at Sriharikota.

“The NVS-01 Satellite tv for pc has been positioned within the exact orbit by the GSLV-F12 car at present, after the debacle we had confronted within the GSLV-F10 mission(in August 2021) and the Cryogenic(third stage) didn’t ignite” Chairman ISRO, Dr. S.Somanath stated.

He added that a number of corrections and modifications had been made to make sure the elevated reliability of the GSLV rocket. He added that the GSLV rocket could be used within the coming months to put in orbit a climate satellite tv for pc and a NASA-ISRO joint satellite tv for pc.

NP Giri, Mission Director, GSLV-F12/NVS-01 stated that using a 4-meter Ogive-shaped payload fairing(nostril cone) on this mission has ensured that the rocket can accommodate and launch larger-sized satellites. Additional, he expressed confidence that the NASA-ISRO Artificial Aperture Radar Satellite tv for pc(NISAR) could be launched by the identical car, subsequent yr.

NASA-ISRO SAR (NISAR) is a Low Earth Orbit (LEO) observatory being collectively developed by the American and Indian House businesses. It’s meant to hold L and S dual-band Artificial Aperture Radar (SAR), a extremely highly effective, all-weather, day and evening imply of imaging from area, that may assist researchers and scientists observe modifications in Earth’s land and ice surfaces all the way down to fractions of an inch. The NISAR satellite tv for pc is present process testing at integration at ISRO’s UR Rao Satellite tv for pc Centre, Bengaluru. 

KVS Bhaskar, the Satellite tv for pc Director for this mission stated that this was a satellite tv for pc launch that everybody within the area of navigation was wanting ahead to, because it additionally operates in L1 band frequency, which is interoperable with Worldwide operators (GPS, Glonass, Galileo, and BeiDou) and in addition comprises an indigenously developed atomic clock. 

NVS-01 is the primary within the sequence of second-generation navigation satellites constructed by ISRO’s UR Rao Satellite tv for pc Centre in Bengaluru. At current, India makes use of its Navigation with Indian Constellation(NavIC) sequence of satellites for civilian and defence navigation, positioning, and timing providers within the Indian mainland and even 1500 km past India’s borders.

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“NVS sequence of satellites will maintain and increase the NavIC with enhanced options. This sequence incorporates L1 band alerts moreover to widen the providers. For the primary time, an indigenous atomic clock will likely be flown in NVS-01” ISRO stated. 

Atomic clocks are extremely exact timekeeping devices which can be positioned inside satellites. They provide measurements of time which can be exact all the way down to a billionth of a second(nanosecond). Such precision is essential as a result of they assist in providing correct positioning providers. Whereas utilizing satellite-based positioning and navigation providers, our place(of the GPS receiver) is set with respect to its distance from a number of satellites.

When such a calculation occurs, the gap worth is obtained by multiplying the time(taken for a sign to journey) and the pace of the sign(nearly just like the pace of sunshine). In such circumstances, (when giant values are being multiplied) even a variation of a billionth of a second can result in an inaccurate distance worth(by just a few meters or tens of meters). Therefore it’s essential to have atomic clocks that may work for a number of years with out even nanosecond-level errors in timekeeping. 

Earlier, the NavIC sequence of satellites had been referred to as IRNSS(Indian Regional Navigation Satellite tv for pc System). It gives two kinds of services- Commonplace Positioning Service (SPS) which is offered to all of the customers and Restricted Service (RS), which is an encrypted service offered solely to the authorised customers.

In response to ISRO, a few of the purposes of the IRNSS/NavIC system are Terrestrial, Aerial, and Marine Navigation, Catastrophe Administration, Car monitoring, and fleet administration, Exact Timing, and many others. In response to ISRO, NavIC SPS alerts are interoperable with different world navigation satellite tv for pc system (GNSS) alerts equivalent to – GPS, Glonass, Galileo, and BeiDou. 

ISRO’s present sequence of NavIC satellites had been positioned in orbit in a phased method between the years 2013 and 2018 utilizing PSLV rockets. All satellites within the first-generation NavIC sequence weighed 1,425kg and carried foreign-origin atomic clocks. All IRNSS/NavIC sequence satellites carried two kinds of payloads – navigation payload and ranging payload.

The navigation payload of transmits alerts for the dedication of place, velocity, and time. Rubidium atomic clocks are a part of the navigation payload of the satellite tv for pc. The ranging payload of those satellites consists of a C-band transponder which facilitates correct dedication of the vary of the satellite tv for pc.

Talking to reporters previous to the launch day, Chairman ISRO, Dr.S. Somanath stated that solely 4 of the prevailing fleet of seven NavIC satellites had been operational now. As a substitute of changing the three defunct satellites of the outdated technology, ISRO is launching a fleet of 5 next-gen NavIC satellites, of which NVS-01 could be the primary, he added.

The rationale behind launching a brand new fleet of 5 satellites is the truth that the prevailing constellation could be defunct in just a few years(owing to the completion of mission life). Therefore, it could not be prudent to switch the outdated fleet. It’s anticipated that two next-gen NavIC satellites will likely be launched yearly. 

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