India successfully deployed the NASA–ISRO Synthetic Aperture Radar (NISAR) satellite using GSLV-F16 from Sriharikota on July 31, 2025
It signifies the inaugural collaborative Earth-observation endeavor between ISRO and NASA, representing profound Indo-US space cooperation.
Regarding India's successful launch of the NASA–ISRO Synthetic Aperture Radar (NISAR) satellite:
What does NISAR refer to?
Full Form – NASA–ISRO Synthetic Aperture Radar: Collaborative Earth observation satellite utilizing dual-frequency SAR technology for monitoring land and ice.
Mission Life – 5 years (2025–2030): Created to gather Earth data over a five-year period with revisits every 12 days.
Orbit – Sun-synchronous polar orbit (747 km): Guarantees uniform illumination for precise change recognition worldwide.
Launch Location – Satish Dhawan Space Centre, Sriharikota: Deployed on GSLV-F16, representing ISRO’s inaugural polar orbit GSLV mission.
Goals of the Nisar Mission:
Identify small land and ice surface shifts with precision at the centimetre level.
Observe natural calamities like earthquakes, floods, landslides, and volcanic eruptions.
Monitor alterations in forests, glaciers, wetlands, and soil moisture.
Aid agriculture, infrastructure, coastal areas, and climate control with practical data.
Important Aspects of the Nisar Mission:
Dual-Frequency SAR: Pioneer satellite employing L-band (NASA) and S-band (ISRO) radar systems.
Extensive Coverage & Detailed Clarity: Captures a 242 km width with precise spatial mapping every 12 days.
All-Conditions, 24/7 Imaging: Functions day and night, including during cloudy weather and storms.
12-meter Deployable Reflector Antenna: Facilitates cutting-edge SweepSAR technology for identifying surface deformation.
Contributions: USA vs. INDIA
NASA: L-band radar, extendable boom, reflective antenna, GPS, solid-state storage, and communication system.
ISRO: radar in S-band, I-3K satellite platform, GSLV-F16 launch vehicle, solar panels, data processing, and ground operations.
Mission Oversight: Collaboratively carried out through NASA’s JPL and ISRO’s various facilities (SAC, URSC, VSSC, NRSC).
Importance of Nisar Mission:
Scientific Advantage: Facilitates worldwide, instantaneous monitoring of Earth systems and disaster prediction.
Strategic Diplomacy: Enhances Indo-US civil space collaboration through “science diplomacy.”
Climate Action & SDGs: Supports worldwide initiatives for climate adaptation, sustainable farming, and resource management.
Knowledge Transfer: Open data policies assist developing countries and worldwide researchers in Earth sciences.
Summary:
NISAR signifies a pivotal moment in the Indo-US space collaboration, merging advanced technology with societal benefits. It shifts India from a utility-focused to a knowledge-based approach in space applications. With NISAR, India reinforces its role in Earth observation, sustainability, and international scientific collaboration.
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