India successfully launched the NASA–ISRO Synthetic Aperture Radar (NISAR) satellite
Kartavya Desk Staff
Syllabus: Science and Technology
Source: TOI
Context: India successfully launched the NASA–ISRO Synthetic Aperture Radar (NISAR) satellite aboard GSLV-F16 from Sriharikota on July 31, 2025.
• It marks the first joint Earth-observation mission between ISRO and NASA, symbolizing deep Indo-US space collaboration.
About India Successfully Launched The NASA–ISRO Synthetic Aperture Radar (NISAR) Satellite:
• What is NISAR? Full Form – NASA–ISRO Synthetic Aperture Radar: Joint Earth observation satellite using dual-frequency SAR tech for land and ice monitoring. Mission Life – 5 years (2025–2030): Designed to capture Earth data over five years with 12-day revisit cycles. Orbit – Sun-synchronous polar orbit (747 km): Ensures consistent lighting for accurate change detection across the globe. Launch Site – Satish Dhawan Space Centre, Sriharikota: Launched aboard GSLV-F16, marking ISRO’s first polar orbit GSLV mission.
• Full Form – NASA–ISRO Synthetic Aperture Radar: Joint Earth observation satellite using dual-frequency SAR tech for land and ice monitoring.
• Mission Life – 5 years (2025–2030): Designed to capture Earth data over five years with 12-day revisit cycles.
• Orbit – Sun-synchronous polar orbit (747 km): Ensures consistent lighting for accurate change detection across the globe.
• Launch Site – Satish Dhawan Space Centre, Sriharikota: Launched aboard GSLV-F16, marking ISRO’s first polar orbit GSLV mission.
• Objectives Of the Nisar Mission:
• Detect minute land and ice surface movements with centimetre-level precision. Monitor natural disasters such as earthquakes, floods, landslides, and volcanic activity. Track changes in forests, glaciers, wetlands, and soil moisture. Support agriculture, infrastructure, coastal, and climate management through actionable data.
• Detect minute land and ice surface movements with centimetre-level precision.
• Monitor natural disasters such as earthquakes, floods, landslides, and volcanic activity.
• Track changes in forests, glaciers, wetlands, and soil moisture.
• Support agriculture, infrastructure, coastal, and climate management through actionable data.
• Key Features of the Nisar Mission:
• Dual-Frequency SAR: First satellite to use both L-band (NASA) and S-band (ISRO) radars. Wide Swath & High Resolution: Scans 242 km swath with detailed spatial mapping every 12 days. All-Weather, 24/7 Imaging: Operates day-night, even through cloud cover and storm conditions. 12-metre Deployable Reflector Antenna: Enables advanced SweepSAR technology for surface deformation detection.
• Dual-Frequency SAR: First satellite to use both L-band (NASA) and S-band (ISRO) radars.
• Wide Swath & High Resolution: Scans 242 km swath with detailed spatial mapping every 12 days.
• All-Weather, 24/7 Imaging: Operates day-night, even through cloud cover and storm conditions.
• 12-metre Deployable Reflector Antenna: Enables advanced SweepSAR technology for surface deformation detection.
• Contributions: INDIA vs. USA
• NASA: L-band radar, deployable boom, reflector antenna, GPS, solid-state recorder, and telecom system. ISRO: S-band radar, satellite bus (I-3K), GSLV-F16 launcher, solar arrays, data handling, and ground control. Mission Management: Jointly executed via NASA’s JPL and ISRO’s multiple centers (SAC, URSC, VSSC, NRSC).
• NASA: L-band radar, deployable boom, reflector antenna, GPS, solid-state recorder, and telecom system.
• ISRO: S-band radar, satellite bus (I-3K), GSLV-F16 launcher, solar arrays, data handling, and ground control.
• Mission Management: Jointly executed via NASA’s JPL and ISRO’s multiple centers (SAC, URSC, VSSC, NRSC).
• Significance Of Nisar Mission:
• Scientific Edge: Enables global-scale, real-time Earth system monitoring and disaster forecasting. Strategic Diplomacy: Strengthens Indo-US civil space cooperation under “science diplomacy.” Climate Action & SDGs: Assists in global efforts towards climate adaptation, sustainable agriculture, and resource governance. Knowledge Export: Open data policy supports developing nations and global researchers in Earth sciences.
• Scientific Edge: Enables global-scale, real-time Earth system monitoring and disaster forecasting.
• Strategic Diplomacy: Strengthens Indo-US civil space cooperation under “science diplomacy.”
• Climate Action & SDGs: Assists in global efforts towards climate adaptation, sustainable agriculture, and resource governance.
• Knowledge Export: Open data policy supports developing nations and global researchers in Earth sciences.
• Conclusion:
NISAR is a landmark in Indo-US space partnership, blending high-end technology with societal impact. It transitions India from utility-driven to knowledge-led space applications. Through NISAR, India affirms its leadership in Earth observation, sustainability, and global science cooperation.