India on Wednesday launched NASA-ISRO Synthetic Aperture Radar (NISAR) satellite, a collaboration between the United States and India aimed at transforming how we monitor our planet. This Earth observation mission promises groundbreaking capabilities in tracking environmental changes with unmatched precision.
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The satellite lifted off from the Satish Dhawan Space Centre in Sriharikota, Andhra Pradesh, at 5:40 PM IST. It was launched aboard the GSLV Mk II, India’s largest non-reusable three-stage launch vehicle, which stands 52 metres (170 feet) tall.
NISAR will take about eight to ten days to fully deploy, followed by a 65-day engineering phase. During this time, scientists will conduct a series of calibration and performance tests to prepare the satellite for full operational use.
What Is NISAR?
NISAR is equipped with dual synthetic aperture radars—an L-band system provided by NASA and an S-band system developed by ISRO. This unique configuration allows the satellite to map the Earth’s surface with precision down to a fraction of an inch. Importantly, it will be able to capture data day and night and in all weather conditions, making it one of the most reliable Earth-observation satellites ever launched.
The satellite will revisit and monitor the planet’s land and ice surfaces every 12 days, a feat no previous satellite has achieved. This will allow researchers to track subtle changes in terrain, vegetation, and glacial structures with high frequency and detail.
Why NISAR Matters
NISAR’s data will be crucial for a wide range of applications. It will aid in disaster response by tracking earthquakes, landslides, and volcanic activity. In agriculture, it will help monitor crop conditions and soil moisture levels. In the realm of climate science, NISAR will provide insights into melting ice sheets, ecosystem changes, and carbon cycle dynamics.
This mission reflects a strong partnership between NASA and ISRO, with both agencies contributing critical technology and expertise. While NASA provided the L-band radar and key instruments, ISRO built the satellite bus and is managing the launch. Together, they aim to create an open-access global data stream that will benefit scientists, governments, and communities around the world.
