Radartutorial .eu ASR-910
Figure 1: Mounting of an ASR-910 antenna
The Air Surveillance Radar ASR-910 is the German fixed-site installation of the AN/TPN-24 airfield surveillance radar used for the air traffic control. This radar is built up on the top of a high tower normally. It gives the air traffic controllers a summary of the airplanes being in airfield proximity. An integrated secondary surveillance radar gives additional information, like flight number and height, upon request. The targets will transfer into the air control center and be able to be displayed on several monitors. The ASR-910 transmittes two interleaved pulses (Frequency Diversity) with a frequency spacing of 74 Megahertzes in the S-Band.
Figure 2: the controllers scope
Its digital moving target indikation system (a wired logic with discrete shift registers and adders) works in accordance with the Doppler effect and can compensate interferences by weather clutter areas also.
An in the scopes integrated Video Mapper generates additional information which can be shown on the screen.
Figure 3: the Shelter with the maintenance- scope
| Specifications | |
|---|---|
| frequency: | S-Band |
| pulse repetition time (PRT): | ca. 952 Microseconds |
| pulse repetition frequency (PRF): | ca. 1050 pulses per second (staggered) |
| pulsewidth (PW): | 2·1 Microseconds |
| receive time: | 801.5 Microseconds |
| dead time: | 150 µs |
| peak power: | 2·500 kilowatts |
| average power: | 2·525 Watts |
| displayed range: | 60 nautical miles |
| range resolution: | 450 ft |
| beamwidth: | 1.55 Degrees |
| hits per scan: | 20 |
| antenna rotation: | 4.2 Seconds |