Sky Scanners: How SAR Imaging Satellites Are Redefining Earth Observation
About 75% of Earth is hidden from optical satellites by clouds or darkness at any time. Synthetic Aperture Radar (SAR) satellites like Sentinel-1, RADARSAT, TerraSAR-X, COSMO-SkyMed, ICEYE, and Capella Space provide high-resolution, all-weather, day-and-night imaging. ICEYE and Capella now offer sub-meter resolution and rapid delivery. NASA/ISRO’s NISAR mission is set to launch in 2025 with dual-band SAR.