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ASR 910

Description of the radar set, tactical-technical characteristics
ASR 910
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Figure 1: Mounting of an ASR 910 antenna

frequency: E-band
pulse repetition time (PRT): ≈ 952 µs
pulse repetition frequency (PRF): ≈ 1050 pps (staggered)
pulsewidth (τ): 2·1 Microseconds
receiving time: 801.5 µs
dead time: 150 µs
peak power: 2·500 kW
average power: 2·525 W
instrumented range: 60 NM
range resolution: 450 ft
beamwidth: 1.55°
hits per scan: 20
antenna rotation: 4.2 s

ASR 910

The ASR 910 was a stationary version of the AN/TPN-24 radar, designed to be used specifically at German airfields. It was a search radar that could be remotely controlled and was primarily used for air traffic control purposes at airfields, functioning as an Air Surveillance Radar. Typically, it was mounted on a high tower, giving air traffic controllers an overview of the aircraft in the vicinity of the airfield. The radar used two transmission pulses (Frequency Diversity) with a frequency spacing of approximately 74 MHz in the S-band (IEEE designation) or E-band (NATO designation). Additionally, an integrated secondary radar unit provided extra information on request, such as flight number and altitude. The air situation was transmitted to the approach control room and could be displayed on multiple display units.

Its digital system for moving target indikation (a hard-wired logic consisting of shift registers and full adders) works according to the Doppler method and can also compensate for interference from poor weather conditions.

A digital video mapper integrated into the PPI-display provided additional geographic information on the screen.

The radar was replaced in 2007 by the ASR-S, a military version of the ASR-E.

Picture gallery of ASR 910
PPI scope

Figure 2: the controllers scope

Shelter innen

Figure 3: the Shelter with
the maintenance- scope

View of an open transmitter with the magnetron

Figure 4: View of an open transmitter with the magnetron

View of an open transmitter with the receiver blocks

Figure 5: The receiver blocks