<p>The countdown for ISRO's (Indian Space reserach Organisation) GSLV F12/NVS-01 launch mission commenced at 7:12 am Sunday, ahead of the lift-off that is scheduled for 10:42 am Monday, WION has learnt. The countdown is the final phase prior to launch where the launch vehicle's liquid and cryogenic fuels are filled and the final health checks of crucial systems are carried out.</p>

<p>The GSLV rocket that stands tall at the second launchpad at the Satish Dhawan Space Centre, Sriharikota, is meant to place a 2,332 kg navigation satellite NVS-01 into a Geosynchronous Transfer Orbit (GTO). The GTO is a temporary parking orbit, into which the satellite will be hurled by the rocket. There on, the satellite will independently use its onboard propulsion systems to perform orbit-raising maneuvres and reach its intended orbit.&nbsp;</p>

<p>This will be the Indian space agency ISRO's fourth launch mission of the calendar year 2023. Thus far in 2023, ISRO has launched its smallest rocket SSLV, the most-flown workhorse rocket PSLV and the heaviest rocket LVM3. Monday's launch will add the GSLV to the list — marking the launch of all four operational vehicles of ISRO in a short span of four months.&nbsp;</p>

<p>NVS-01 is the first in the series of second-generation navigation satellites built by ISRO's UR Rao Satellite Centre in Bengaluru. At present, India uses its Navigation with Indian Constellation (NavIC) series of satellites for civilian and defence navigation, positioning, and timing services in the Indian mainland and even 1500 km beyond India's borders.&nbsp;</p>

<p>"NVS series of satellites will sustain and augment the NavIC with enhanced features. This series incorporates L1 band signals additionally to widen the services. For the first time, an indigenous atomic clock will be flown in NVS-01," ISRO said.&nbsp;</p>

<p><a href="https://www.wionews.com/videos/india-reveals-timeline-for-its-third-lunar-mission-chandrayaan-3-450390"><strong>WATCH | India reveals timeline for its third Lunar mission 'Chandrayaan-3'</strong></a></p>

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<p>Atomic clocks are highly precise timekeeping instruments that are placed within satellites. They offer measurements of time that are precise down to a billionth of a second (nanosecond). Such precision is crucial because they help in offering accurate positioning services.</p>

<p>While using satellite-based positioning and navigation services, our position (of the GPS receiver) is determined concerning its distance from multiple satellites. When such a calculation happens, the distance value is obtained by multiplying the time (taken for signal to travel) and the speed of the signal (almost similar to the speed of light). In such cases, (when large values are being multiplied) even a variation of a billionth of a second can lead to an inaccurate distance value (by a few metrrs or tens of metres). Hence it is necessary to have atomic clocks that can work for several years without even nanosecond-level errors in timekeeping.&nbsp;</p>

<p><a href="https://www.wionews.com/science-technology/exclusive-chandrayaan-3-spacecraft-arrives-at-indias-spaceport-in-preparation-for-july-launch-597257"><strong>ALSO READ |&nbsp;Exclusive: Chandrayaan-3 spacecraft arrives at India's spaceport in preparation for July launch</strong></a></p>

<p>Earlier, the NavIC series of satellites were known as IRNSS (Indian Regional Navigation Satellite System). It provides two types of services&nbsp;— Standard Positioning Service (SPS) which is provided to all the users and Restricted Service (RS), which is an encrypted service provided only to the authorised users. According to ISRO, some of the applications of the IRNSS/NavIC system are terrestrial, aerial and marine navigation, disaster management, vehicle tracking and fleet management and precise timing. According to ISRO, NavIC SPS signals are interoperable with other global navigation satellite system (GNSS) signals such as - GPS, Glonass, Galileo, and BeiDou.</p>

<h2><strong>ISRO's NavIC satellites</strong></h2>

<p>ISRO's current series of eight NavIC satellites were placed in orbit in a phased manner between the years 2013 and 2018 using PSLV rockets. All satellites in the first-generation NavIC series weighed 1,425 kg and carried foreign-origin atomic clocks. All IRNSS/NavIC series satellites carried two types of payloads – navigation payload and ranging payload.&nbsp;</p>

<p>The navigation payload transmits signals for the determination of position, velocity and time. Rubidium atomic clocks are part of the navigation payload of the satellite. The ranging payload of these satellites consists of a C-band transponder which facilitates accurate determination of the range of the satellite.&nbsp;<br />
<br />
&nbsp;</p>

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The countdown for ISRO's (Indian Space reserach Organisation) GSLV F12/NVS-01 launch mission commenced at 7:12 am Sunday, ahead of the lift-off that is scheduled for 10:42 am Monday, WION has learnt.

The countdown for ISRO's (Indian Space reserach Organisation) GSLV F12/NVS-01 launch mission commenced at 7:12 am Sunday, ahead of the lift-off that is scheduled for 10:42 am Monday, WION has learnt. The countdown is the final phase prior to launch where the launch vehicle's liquid and cryogenic fuels are filled and the final health checks of crucial systems are carried out. The GSLV rocket that stands tall at the second launchpad at the Satish Dhawan Space Centre, Sriharikota, is meant to place a 2,332 kg navigation satellite NVS-01 into a Geosynchronous Transfer Orbit (GTO). The GTO is a temporary parking orbit, into which the satellite will be hurled by the rocket. There on, the satellite will independently use its onboard propulsion systems to perform orbit-raising maneuvres and reach its intended orbit. This will be the Indian space agency ISRO's fourth launch mission of the calendar year 2023. Thus far in 2023, ISRO has launched its smallest rocket SSLV, the most-flown workhorse rocket PSLV and the heaviest rocket LVM3. Monday's launch will add the GSLV to the list — marking the launch of all four operational vehicles of ISRO in a short span of four months. NVS-01 is the first in the series of second-generation navigation satellites built by ISRO's UR Rao Satellite Centre in Bengaluru. At present, India uses its Navigation with Indian Constellation (NavIC) series of satellites for civilian and defence navigation, positioning, and timing services in the Indian mainland and even 1500 km beyond India's borders. "NVS series of satellites will sustain and augment the NavIC with enhanced features. This series incorporates L1 band signals additionally to widen the services. For the first time, an indigenous atomic clock will be flown in NVS-01," ISRO said. WATCH | India reveals timeline for its third Lunar mission 'Chandrayaan-3' × Atomic clocks are highly precise timekeeping instruments that are placed within satellites. They offer measurements of time that are precise down to a billionth of a second (nanosecond). Such precision is crucial because they help in offering accurate positioning services. While using satellite-based positioning and navigation services, our position (of the GPS receiver) is determined concerning its distance from multiple satellites. When such a calculation happens, the distance value is obtained by multiplying the time (taken for signal to travel) and the speed of the signal (almost similar to the speed of light). In such cases, (when large values are being multiplied) even a variation of a billionth of a second can lead to an inaccurate distance value (by a few metrrs or tens of metres). Hence it is necessary to have atomic clocks that can work for several years without even nanosecond-level errors in timekeeping. ALSO READ | Exclusive: Chandrayaan-3 spacecraft arrives at India's spaceport in preparation for July launch Earlier, the NavIC series of satellites were known as IRNSS (Indian Regional Navigation Satellite System). It provides two types of services — Standard Positioning Service (SPS) which is provided to all the users and Restricted Service (RS), which is an encrypted service provided only to the authorised users. According to ISRO, some of the applications of the IRNSS/NavIC system are terrestrial, aerial and marine navigation, disaster management, vehicle tracking and fleet management and precise timing. According to ISRO, NavIC SPS signals are interoperable with other global navigation satellite system (GNSS) signals such as - GPS, Glonass, Galileo, and BeiDou. ISRO's NavIC satellites ISRO's current series of eight NavIC satellites were placed in orbit in a phased manner between the years 2013 and 2018 using PSLV rockets. All satellites in the first-generation NavIC series weighed 1,425 kg and carried foreign-origin atomic clocks. All IRNSS/NavIC series satellites carried two types of payloads – navigation payload and ranging payload. The navigation payload transmits signals for the determination of position, velocity and time. Rubidium atomic clocks are part of the navigation payload of the satellite. The ranging payload of these satellites consists of a C-band transponder which facilitates accurate determination of the range of the satellite. WATCH WION LIVE HERE:

Countdown starts for ISRO’s navigation satellite launch; lift-off at 10:42 am Monday

<p>Indian space research organisation (ISRO) chairman K Sivan said the space agency will <a href="http://www.wionews.com/india-news/isro-launches-gsat-7a-satellite-will-aid-army-air-force-communications-185316">launch the Chandrayaan-2 mission</a> in mid-April while adding that it has targeted two unmanned missions to space in December 2020 and July 2021.</p>

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<p>Addressing the media at Bengaluru, the ISRO chief said: "Preparations for Gaganyaan mission are underway. It has been a major turning point for ISRO." The ISRO chief informed that the space agency carried out 17 missions last year with seven being launch missions.</p>

<p>"The target for two unmanned missions to space is December 2020 and July 2021. The target for a manned mission to space is December 2021," Sivan said.</p>

<p>"In 2018, <a href="http://www.wionews.com/india-news/isro-launches-indias-heaviest-satellite-the-gsat-11-181542">ISRO launched the heaviest satellite</a> into space," he said, adding,"Rs 10,000 crore approved for has been approved for Gaganyan."</p>

<p>"The inital training for Gaganyaan will be done in India and advanced training maybe in Russia. Women astronauts will be there on the team. That's our aim," the ISRO chief said.</p>

<p>Sivan said the agency had created a science centre in Jammu and Kashmir while informing that human space programme will be a turning point for the space organization.</p>

<p>"We will set up six incubation and research centres across the country. We will bring the Indian students to ISRO. Why do the Indian students need to go to NASA?"</p>

<p>The objective of the Chandrayaan-2 mission is to carry a three-member crew to low Earth orbit and return them safely to a predefined destination on Earth. PM Modi had on Independence Day announced that the mission would be undertaken by 2022.</p>

<p>The Chandrayaan-2 consists of a lunar orbiter, lander and rover developed by ISRO. The mission was delayed after Russia's Roscosmos failed to provide the lander, later the Russian space agency pulled out of the project leading the space body to develop it indigenously.&nbsp;</p>

<p>This year is the birth centenary of the founding father of Indian Space programme, Vikram A Sarabhai, and year-long celebrations, consisting of a host of national and international events would commence August 12, 2019.</p>


Indian space research organisation (ISRO) chairman K Sivan said the space agency will launch the Chandrayaan-2 mission in mid-April while adding that it has targeted two unmanned missions to space in December 2020 and July 2021.

Indian space research organisation (ISRO) chairman K Sivan said the space agency will launch the Chandrayaan-2 mission in mid-April while adding that it has targeted two unmanned missions to space in December 2020 and July 2021. #WATCH ISRO Chief K Sivan addresses the media in Bengaluru https://t.co/uVlxoZaJpk — ANI (@ANI) January 11, 2019 × Addressing the media at Bengaluru, the ISRO chief said: "Preparations for Gaganyaan mission are underway. It has been a major turning point for ISRO." The ISRO chief informed that the space agency carried out 17 missions last year with seven being launch missions. "The target for two unmanned missions to space is December 2020 and July 2021. The target for a manned mission to space is December 2021," Sivan said. "In 2018, ISRO launched the heaviest satellite into space," he said, adding,"Rs 10,000 crore approved for has been approved for Gaganyan." "The inital training for Gaganyaan will be done in India and advanced training maybe in Russia. Women astronauts will be there on the team. That's our aim," the ISRO chief said. Sivan said the agency had created a science centre in Jammu and Kashmir while informing that human space programme will be a turning point for the space organization. "We will set up six incubation and research centres across the country. We will bring the Indian students to ISRO. Why do the Indian students need to go to NASA?" The objective of the Chandrayaan-2 mission is to carry a three-member crew to low Earth orbit and return them safely to a predefined destination on Earth. PM Modi had on Independence Day announced that the mission would be undertaken by 2022. The Chandrayaan-2 consists of a lunar orbiter, lander and rover developed by ISRO. The mission was delayed after Russia's Roscosmos failed to provide the lander, later the Russian space agency pulled out of the project leading the space body to develop it indigenously. This year is the birth centenary of the founding father of Indian Space programme, Vikram A Sarabhai, and year-long celebrations, consisting of a host of national and international events would commence August 12, 2019.

Chandrayaan-2 mission in mid-April; targeting manned mission to space in 2021: ISRO

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Countdown starts for ISRO’s navigation satellite launch; lift-off at 10:42 am Monday

Chandrayaan-2 mission in mid-April; targeting manned mission to space in 2021: ISRO