Airport Surveillance Radar
Airport Surveillance Radar or Aerodrome Surveillance Radar (ASR), German airport surveillance radar or approach radar , is an air traffic control radar for airspace surveillance in and around airports . These medium-range radars are required by air traffic controllers to keep track of all flight movements around an airport and to ensure air traffic in a safe way. The ASR (primary radar) usually work with frequencies in the 2.7 GHz to 2.9 GHz range with peak powers around 25 kW and a range of around 100 km. In addition to the primary radar, ASR are usually also equipped with a secondary radar which is used to query the transponder .
Redundancy is an important feature of ASR : all systems must be available multiple times in order to be able to compensate for technical failures or defects immediately.
Newer ASR work digitally and also have a weather channel option for displaying weather phenomena in the vicinity of the airfield, such as the ASR-11 .
Individual evidence
- ↑ a b Airport Surveillance Radar (ASR-11). Retrieved June 24, 2014 .