Surveillance radar is a technology used to detect and track objects, such as aircraft, ships, and vehicles, over a wide area. It emits radio waves that bounce off these objects and return to the radar system, allowing it to determine their location, speed, and direction. This information is crucial for air traffic control, maritime navigation, and military operations. The radar system consists of a transmitter, which sends out the radio waves, and a receiver, which captures the reflected signals. Modern surveillance radar can operate in various weather conditions and can cover large distances, making it an essential tool for monitoring and ensuring safety in various environments.