Satellite Disaster Response: Radar Technology
- A groundbreaking partnership between NASA and the Indian Space Research Organisation (ISRO) has reached a critical milestone.
- Launched on July 30, 2025, from the Satish Dhawan Space Center on India's southeast coast, NISAR represents the most advanced radar system NASA has ever launched. The satellite's...
- NISAR is designed to monitor a wide range of dynamic processes on Earth's surface.
NISAR Satellite Deploys Massive Antenna, Ushering in New Era of Earth Observation
Table of Contents
Published August 22, 2025
A New Eye on Earth
A groundbreaking partnership between NASA and the Indian Space Research Organisation (ISRO) has reached a critical milestone. The NASA-ISRO Synthetic Aperture Radar (NISAR) satellite has successfully deployed its 39-foot (12-meter) radar antenna reflector in low Earth orbit. This achievement, completed seventeen days after launch, marks a pivotal moment in the mission’s preparation for unprecedented Earth imaging.
Launched on July 30, 2025, from the Satish Dhawan Space Center on India’s southeast coast, NISAR represents the most advanced radar system NASA has ever launched. The satellite’s synthetic aperture radar functions much like a camera lens, focusing on creating clear, detailed images of our planet.
What Will NISAR Monitor?
NISAR is designed to monitor a wide range of dynamic processes on Earth’s surface. Key areas of focus include:
- Movement of Ice Sheets and Glaciers: Tracking changes in ice mass to understand sea level rise.
- Ground Deformation: Monitoring shifts in the Earth’s crust caused by earthquakes, volcanic activity, and landslides.
- Ecosystem Changes: Observing alterations in forests and other ecosystems.
- Disaster Monitoring: Providing critical data for responding to natural disasters.
- Infrastructure and Agriculture: Supporting monitoring efforts in these vital sectors.
The satellite will orbit Earth 14 times a day, scanning nearly all land and ice surfaces twice every 12 days, providing frequent and thorough data.
Building on Decades of radar Technology
NISAR isn’t a completely new concept. It builds upon a legacy of space-based radar development that began with the launch of a similar system by the Jet Propulsion Laboratory (JPL) in 1978. The current mission represents a meaningful advancement in this technology, offering increased resolution and broader coverage.