NISAR is a cutting-edge Earth observation satellite jointly developed by NASA (United States) and ISRO (India). It is designed to provide high-resolution, all-weather, day-and-night imaging of Earth’s surface using advanced Synthetic Aperture Radar (SAR) technology operating in both L-band and S-band frequencies.

Primary Objectives:

• Monitor changes in Earth’s land and ice surfaces, including tectonic plate movement, landslides, and glacier dynamics.

• Study ecosystem changes, agricultural patterns, and natural resources.

• Track natural disasters like earthquakes, volcanic eruptions, and tsunamis to improve disaster response.

• Contribute to climate change research by analyzing biomass, soil moisture, and carbon cycle dynamics.

Key Features:

• Dual-frequency SAR (L-band by NASA, S-band by ISRO).

• High-resolution radar imaging capability through clouds and darkness.

• Large deployable radar antenna (~12 meters in diameter).

• 747 km sun-synchronous orbit with a 12-day repeat cycle for global coverage.

Launch:

• Planned launch: 2024 (aboard GSLV Mk II from India).

Significance:
NISAR is one of the most advanced Earth science missions, aimed at improving our understanding of Earth’s dynamic systems, enhancing resource management, and supporting disaster mitigation globally.