Radar imaging is a technique that uses radio waves to create images of objects or landscapes. It works by sending out a radar signal, which bounces off surfaces and returns to the radar system. The time it takes for the signal to return helps determine the distance to the object, while the strength of the returned signal provides information about its characteristics. This technology is widely used in various fields, including meteorology for weather monitoring, aviation for air traffic control, and geology for mapping the Earth's surface. Radar imaging can penetrate clouds and darkness, making it valuable for continuous observation.