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- Nisar Satellite Launch Live Updates: India launches Nasa-Isro Nisar satellite, will deliver real-time climate data
THE TIMES OF INDIA | Jul 30, 2025, 19:51:35 IST
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Nisar Satellite Launch Live Updates: India launches Nasa-Isro Nisar satellite, will deliver real-time climate data
Unlike optical sensors, the synthetic aperture radar (SAR) at the heart of the Nisar mission doesn’t rely on visible light. SAR uses microwaves, allowing satellites to “see” through clouds and operate day or night. This makes it a powerful tool for monitoring everything - from Antarctic ice to earthquakes and deforestation.
SAR can observe surface change in any weather, at any time, making it essential for studying Earth’s dynamic systems. It supports disaster response, environmental monitoring, and climate science. For example, SAR can measure how much a glacier has retreated, track soil moisture changes during droughts, or detect whether land near a fault line has subtly shifted.
According to Charles Elachi, a former director of Nasa’s Jet Propulsion Laboratory, puts it: "SAR allows us to refine things very accurately. By capturing frequent and detailed images of the same locations, missions like Nisar can monitor change over time — turning raw radar echoes into critical knowledge about Earth’s evolving surface.
SAR can observe surface change in any weather, at any time, making it essential for studying Earth’s dynamic systems. It supports disaster response, environmental monitoring, and climate science. For example, SAR can measure how much a glacier has retreated, track soil moisture changes during droughts, or detect whether land near a fault line has subtly shifted.
According to Charles Elachi, a former director of Nasa’s Jet Propulsion Laboratory, puts it: "SAR allows us to refine things very accurately. By capturing frequent and detailed images of the same locations, missions like Nisar can monitor change over time — turning raw radar echoes into critical knowledge about Earth’s evolving surface.
19:51 (IST) Jul 30
Nisar Satellite Launch Live Updates: 'GSLV F16 successfully injected NASA-ISRO NISAR satellite,' says Isro chief
"Nisar will enable the scientific community to detect the surface variations, sea height detection, investigate natural hazards, monitor soil moisture and many other applications. The potential from the satellite are huge and the global scientific community is eagerly awaiting for the satellite data for their respective research and usage," Isro chief V Narayanan said.
19:12 (IST) Jul 30
Nisar Satellite Launch Live Updates: Union minister Jitendra Singh congratulates Isro
“Congratulations India! Successful launch of #GSLV-F16 carrying the world’s first dual-band radar satellite #NISAR…a game changer in precise management of disasters like cyclones, floods, etc,” Singh said in a post on social media platform X.
“NISAR’s capacity to penetrate through fogs, dense clouds, ice layers, etc., makes it a pathbreaking enabler for the aviation and shipping sectors. The inputs from NISAR will benefit the entire world community…in the true spirit of 'Vishwabandhu’,” the minister added.
He also expressed pride in being “associated with the Department of Space at a time when Isro is registering one global milestone after the other”.
“NISAR’s capacity to penetrate through fogs, dense clouds, ice layers, etc., makes it a pathbreaking enabler for the aviation and shipping sectors. The inputs from NISAR will benefit the entire world community…in the true spirit of 'Vishwabandhu’,” the minister added.
He also expressed pride in being “associated with the Department of Space at a time when Isro is registering one global milestone after the other”.
18:34 (IST) Jul 30
Nisar Satellite Launch Live Updates: Indian Space Association hails 'milestone launch'
“The successful launch of the Indo-US NISAR Mission is a landmark in international cross-border space collaboration, showcasing the strength of ISRO and NASA’s scientific partnership in advancing Earth observation. While this mission was primarily led by national agencies, it paves the way for the dynamic Indian private space sector to actively contribute to such cutting-edge collaborations in the near future. NISAR’s advanced radar technology will generate vital data to address global challenges like climate change, disaster response and resource management. The mission reaffirms India’s growing role as a trusted global space partner. As India’s private space industry also evolves, we remain committed to fostering innovative public-private partnerships that will enhance collaboration and drive the next wave of growth and value creation in the global space economy.” - Lt. Gen. AK Bhatt (Retd.), Director General, Indian Space Association (ISpA)
18:01 (IST) Jul 30
Nisar Satellite Launch Live Updates: Isro hails 'flawless' performance
"Separation confirmed. Each stage, precise. Cryo ignition and Cryo stage performance flawless. GSLV-F16 delivered NISAR to orbit," tweets Isro.
17:50 (IST) Jul 30
Nisar Satellite Launch Live Updates: Second stage of separation over; third stage begins
Second stage of the GLSV carrier separates; third stage (cryo) commences.
17:25 (IST) Jul 30
Nisar Satellite Launch Live Updates: Automatic launch sequence begins
Nisar mission authorises automatic launch sequence of Nasa-Isro Nisar mission.
The mission will be aided with ground station support of the two space agencies for downloading of the acquired images, which, after the necessary processing, will be disseminated to the user community.
The mission will be aided with ground station support of the two space agencies for downloading of the acquired images, which, after the necessary processing, will be disseminated to the user community.
17:08 (IST) Jul 30
Nisar Satellite Launch Live Updates: 102nd launch from SDSC, Sriharikota
The mission is GSLVs 18th flight, and 12th flight with the indigenous cryogenic stage. It is also the 102nd launch from the Satish Dhawan Space Centre, Sriharikota.
Nisar mission will be aided with ground station support of both Isro and Nasa for downloading of the acquired images, which, after the necessary processing, will be disseminated to the user community.
Nisar mission will be aided with ground station support of both Isro and Nasa for downloading of the acquired images, which, after the necessary processing, will be disseminated to the user community.
16:51 (IST) Jul 30
Nisar Satellite Launch Live Updates: Mission under development for over a decade
The satellite has been under development for more than a decade.
Isro will also handle satellite commanding and operations; Nasa will provide the orbit manoeuvre plan and radar operations plan.
Isro will also handle satellite commanding and operations; Nasa will provide the orbit manoeuvre plan and radar operations plan.
16:44 (IST) Jul 30
Nisar Satellite Launch Live Updates: Mission countdown in progress
Countdown for GSLV-F16/Nisar mission has started, and is currently in progress. The rocket carrying the earth observation satellite is scheduled to lift off from the second launch pad in Satish Dhawan Space Centre at 5:40 pm.
16:29 (IST) Jul 30
Nisar Satellite Launch Live Updates: Space scientist hails "breakthrough" launch
Space scientist and professor RC Kapoor has lauded Nisar as "the most advanced Earth observation satellite" to date.
Speaking to ANI ahead of the launch of the Nasa-Isro Synthetic Aperture Radar, Kapoor said, "It's a major collaboration between two great agencies, Nasa and Isro. It's going to be placed in orbit around the Earth, at a height of about 743km. It will scan the entire Earth in about 12 days."
The scientist added that Nisar will produce an enormous volume of high-resolution data daily, providing critical insights for scientists, disaster management authorities, policymakers, and environmental researchers.
He further stated, "It will generate a tremendous amount of data per day, which will be greatly useful to many decision makers, disaster managers, and others who want to make a detailed study of the Earth. As of today, it is going to be the most advanced Earth observation satellite."
Speaking to ANI ahead of the launch of the Nasa-Isro Synthetic Aperture Radar, Kapoor said, "It's a major collaboration between two great agencies, Nasa and Isro. It's going to be placed in orbit around the Earth, at a height of about 743km. It will scan the entire Earth in about 12 days."
The scientist added that Nisar will produce an enormous volume of high-resolution data daily, providing critical insights for scientists, disaster management authorities, policymakers, and environmental researchers.
He further stated, "It will generate a tremendous amount of data per day, which will be greatly useful to many decision makers, disaster managers, and others who want to make a detailed study of the Earth. As of today, it is going to be the most advanced Earth observation satellite."
16:13 (IST) Jul 30
Nisar Satellite Launch Live Updates: First 3 months dedicated to decommissioning
The first 90 days after launch will be dedicated to commissioning, or In-Orbit Checkout (IOC), the objective of which is to prepare the observatory for science operations. Commissioning is divided into sub-phases of initial checks and calibrations of mainframe elements followed by JPL engineering payload and instrument checkout.
16:12 (IST) Jul 30
Nisar Satellite Launch Live Updates: Isro to livestream satellite launch
Isro will livestream the launch of the Nisar mission. The coverage will begin at 5:10 pm, followed by launch 30 minutes later.
The launch can be viewed
here.
16:10 (IST) Jul 30
Nisar Satellite Launch Live Updates: Other objectives of Nisar
In addition to its primary objective, the mission also aims to measure the woody biomass and its changes; track changes in the extent of active crops; understand the changes in wetlands’ extent; map Greenland’s & Antarctica’s ice sheets, dynamics of sea ice and mountain glaciers; and characterize land surface deformation related to seismicity, volcanism, landslides, and subsidence & uplift associated with changes in subsurface aquifers, hydrocarbon reservoirs, etc.
16:07 (IST) Jul 30
Nisar Satellite Launch Live Updates: What is Nisar?
It is an L and S-band, global, microwave imaging mission, with capability to acquire fully polarimetric and interferometric data.
Nisar's unique dual-band SAR employs advanced, novel SweepSAR technique, which provides high resolution and large swath imagery. Nisar will image the global land and ice-covered surfaces, including islands, sea-ice and selected oceans every 12 days.
Nisar's unique dual-band SAR employs advanced, novel SweepSAR technique, which provides high resolution and large swath imagery. Nisar will image the global land and ice-covered surfaces, including islands, sea-ice and selected oceans every 12 days.
16:05 (IST) Jul 30
Nisar Satellite Launch Live Updates: What are the mission's primary objectives?
NISAR mission’s primary objectives are to study land & ice deformation, land ecosystems, and oceanic regions in areas of common interest to the US and Indian science communities.
The Nasa-Isro Synthetic Aperture Radar (Nisar), a first-of-its kind mission, will be launched by Isro from its from Satish Dhawan Space Centre, in Andhra Pradesh's Sriharikota at 5:40 pm on Wednesday. An earth observation satellite, NISAR using the GSLV-F16 rocket. The countdown for the launch began yesterday at 2:10 pm.
The much-anticipated NISAR launch into the Sun Synchronous Polar Orbit is being carried out by GSLV (Geosynchronous Satellite Launch Vehicle) instead of the usual PSLV (PolarA Satellite Launch Vehicle) as the satellite is heavier. NISAR is a unique Earth observation satellite and the mission marks the first hardware collaboration between the Indian and the US space agencies, with each providing a different radar system for the satellite.
The much-anticipated NISAR launch into the Sun Synchronous Polar Orbit is being carried out by GSLV (Geosynchronous Satellite Launch Vehicle) instead of the usual PSLV (PolarA Satellite Launch Vehicle) as the satellite is heavier. NISAR is a unique Earth observation satellite and the mission marks the first hardware collaboration between the Indian and the US space agencies, with each providing a different radar system for the satellite.
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