Synthetic aperture radar?

• SAR uses microwave pulses to capture detailed images in dark or cloudy conditions.

• The antenna receiving the echoes is crucial, with smaller antennas carried on moving platforms like satellites.

• Software can mimic a single antenna hundreds of meters long by stitching them together with precise timing and phase information.

• SAR can collect data 24/7 due to microwave penetration into clouds, smoke, and light rainfall.

• Different materials like soil, vegetation, water, and metals reflect microwaves differently, allowing SAR to detect invisible changes.

• NASA-ISRO SAR mission has arrived, scanning nearly all of earth’s land and ice surfaces twice every 12 days.