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ALWIN

Description of the radar set, tactical-technical characteristics
Specifications
frequency: 53.5 MHz
(VHF-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): < 50 kHz
pulsewidth (τ):
receive time:
dead time:
peak power: 36 kW
average power: 1.8 kW
instrumented range: 95 km
range resolution: 150 m
accuracy:
beamwidth: 6.5°
hits per scan:
antenna rotation:
MTBCF:
MTTR:

ALWIN

ALWIN (AL omar WIN d radar) was an MST-Radar operating in lower VHF-Band. The antenna array is formed by 144 Yagi-antennas each of four elements. The radiators were organized as a square array with 6 × 6 antenna groups of 4 Yagis each.

The radar was built in Kühlungsborn by the Leibnitz-Institute in 1997/98 to study the dynamics and structure of the middle atmosphere. The transceiver equipment was moved to Andenes‎ on the Norwegian island of Andøya north of the Arctic Circle. The radar was rebuilt to the ALWIN radar and was used from October 1998 to September 2008 in a continuous and unattended operation. Around 2010, the ALWIN radar was replaced by the more sensitive and more accurate MAARSY radar. Parts of the old antenna array continue to be used as a passive sensor under the name ALWIN64.