Radar satellites see through clouds and darkness to reveal Earth's hidden surface changes.

Radar technology enables satellites to observe our planet regardless of weather or light conditions. By emitting radio waves and measuring their echoes, these systems capture detailed imagery that remains invisible to the human eye, providing critical data for monitoring environmental shifts.

Radar satellites, such as the Copernicus Sentinel-1 mission, function by transmitting radio waves toward the Earth. These waves bounce off objects on the surface and return to the satellite as echoes, which are then processed into detailed imagery. Unlike optical sensors, radar is not limited by cloud cover, darkness, or adverse weather.

This capability allows researchers to detect subtle modifications on the Earth's surface that would otherwise go unnoticed. By consistently monitoring these changes, radar technology provides a unique perspective on our planet, transforming how we track environmental and physical developments from space.

Source: How do radar satellites work?