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File:Ssr coelpin.jpg

Ssr_coelpin.jpg ‎(800 × 600 pixels, file size: 190 KB, MIME type: image/jpeg)

Description
English: A secondary surveillance radar (SSR) near the military airport "Neubrandenburg" (ETNU) in Germany/Western-Pommerania. SSRs interrogate the transponders on civilian craft and the IFF (Identification Friend or Foe) units on military craft. These units transmit a coded signal back to the SSR identifying the aircraft and giving its altitude, so this information appears on the radar screen of the air traffic controller. This SSR uses an LVA (large vertical array) antenna. It consists of a series of vertical waveguides with slots cut in them which act as radiators. This type of phased array antenna has better control of energy radiated at low angles, preventing ground reflections that cause nulls in the radiation pattern which can result in an aircraft not being detected.
Deutsch: Ein Sekundärradargerät der Deutschen Flugsicherung in der Nähe von Neubrandenburg (Mecklenburg/Vorpommern) mit einer de:LVA-Antenne.
Date
Source Self-photographed
Author c.w.
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(Reusing this file)		 GFDL


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inception

13 August 2006

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Date/TimeThumbnailDimensionsUserComment
current10:26, 23 March 2007Thumbnail for version as of 10:26, 23 March 2007800 × 600 (190 KB)Ian Dunster~commonswikiLightened, adjusted shadows/contrast and set levels.
12:14, 13 August 2006Thumbnail for version as of 12:14, 13 August 2006800 × 600 (52 KB)Charly WhiskySecondary Surveillance Radar (SSR) using a Large Vertical Aperture (LVA) as antenna
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