The following Air Traffic Control (ATC) surveillance, approach and landing radars are commonly used in Air Traffic Management (ATM):
- en-route radar systems,
- Air Surveillance Radar (ASR) systems,
- Precision Approach Radar (PAR) systems,
- surface movement radars, and
- special weather radars.
SRE-M7, a typically en-route radar made by the German DASA company
En-route radar systems operate in L-Band usually. These radar sets initially detect and determine the position, course, and speed of air targets in a relatively large area up to 250 nm.
Air Surveillance Radar (ASR)
Airport Surveillance Radar (ASR) is an approach control radar used to detect and display an aircraft's position in the terminal area. These radar sets operate usually in E-Band, and are capable of reliably detecting and tracking aircraft at altitudes below 25,000 feet (7,620 meters) and within 40 to 60 nautical miles (75 to 110 km) of their airport.
Precision Approach Radar PAR-80 made by ITT
Precision Approach Radar (PAR)
The ground-controlled approach is a control mode in which an aircraft is able to land in bad weather. The pilot is guided by ground control using precision approach radar. The guidance information is obtained by the radar operator and passed to the aircraft by either voice radio or a computer link to the aircraft.
Surface Movement Radar (SMR)
The Surface Movement Radar (SMR) scans the airport surface to locate the positions of aircraft and ground vehicles and displays them for air traffic controllers in bad weather. Surface movement radars operate in J- to X- Band and use an extremely short pulse-width to provide an acceptable range-resolution.
Specially weather-radar applications
Weather radar is very important for the air traffic management. There are weather-radars specially designed for the air traffic safety.