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AORL-85

Description of the radar set, tactical-technical characteristics

Figure 1: AORL-85

Figure 1: AORL-85

Specifications
AORL-85AORL-85MA
frequency: 1 216 … 1 278 MHz1 250 … 1 350 MHz
pulse repetition time (PRT):
pulse repetition frequency (PRF):
pulsewidth (τ): 24 µs1.5; 19.5; 64 µs
receiving time:
dead time:
peak power: 35 kW4 kW
average power: 450 W
instrumented range: 60 NM (≙ 110 km)
range resolution: 250 m230 m
accuracy: 250 m150 m; 0.25°
beamwidth: 2.1°3.5°
hits per scan:
antenna rotation: 9 … 11 rpm12 rpm
MTBCF: 1 000 h5 000 h
MTTR: 60 min30 min

AORL-85

The AORL-85 “Ekran” (abbr. of Aerodromnyy Obzornyy RadioLokator; Cyrillic: Аэродромный Обзорный РадиоЛокатор «Экран-85») is an operating in L-band airport surveillance radar, designed for the detection and determination of aircraft coordinates (azimuth, distance) and the management of air traffic on the airfield site.

The radar uses a double-curved parabolic reflector with dimensions of 7.5 × 4 m. The antenna is fed by two horn radiators and forms two antenna patterns (lower beam, upper beam). The waveform of the transmitted signal is intrapulsmodulated with linear frequency modulation. The radar can select between 8 transmitting frequencies in the specified frequency range.

AORL-85 is fitted with two secondary radars for national and international modes. Both secondary radars use the additional omnidirectional antenna next to the parabolic reflector for sidelobe suppression.

A modernization also uses assemblies of the successor model AORL-1.