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Terminal Doppler Weather Radar

Description of the radar set, tactical-technical characteristics

Figure 1: TDWR

Figure 1: TDWR Site, located in Virginia (USA)
(39°05'01.0"N 77°31'45.0"W)

frequency: 5.5 … 5.65 GHz
pulse repetition time (PRT):
pulse repetition frequency (PRF): 300 Hz (long-range surveillance)
1 200-1 700 Hz (Doppler velocity hits)
pulsewidth (τ): 1.1 µs
receiving time:
dead time:
peak power: 250 kW
average power: 550 W
instrumented range: 275 NM (≙ 460 km)
range resolution:
elevation coverage:
beamwidth: 0.55°
hits per scan: 5 rpm
MTBCF: 1 500 hrs

Terminal Doppler Weather Radar

Terminal Doppler Weather Radar (TDWR) is a C-band Doppler radar designed to detect windshear and similar wind-related events in terminal air traffic control areas. It is a fully coherent, high-sensitivity, high-resolution radar using a klystron transmitter tube. The Terminal Doppler Weather Radar Antenna is an all-aluminum, solid surface, 25-foot reflector designed for both outdoor and radome environments.

The TDWR measures winds, turbulence, and storm formations in and around an airport as often as once every minute. The Doppler-effect allows the system to detect the movement of air masses that can form into a windshear or a microburst. The data processing algorithms are predictive and designed to forecast the development of microburst phenomena and project wind direction shifts. TDWR is not dependent on precipitation to determine the existence of weather activity. The Doppler radar processes detected microscopic dust particles and insects to determine wind speed and direction.

Bildergalerie vom Terminal Doppler Weather Radar
Picture gallery of Terminal Doppler Weather Radar
Galerie du radar Terminal Doppler Weather Radar
Galerie de imagini de Terminal Doppler Weather Radar
TDWR Radarın resimleri

Figure 2: 25-foot reflector antenna