Talk:Radar altimeter

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 Definition:  Altimeter which calculates altitudes, by sending a radio signal straight down from an aircraft and to measure its total time of travel to the surface and back to the aircraft. [d] [e]
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Signal type and altitude

Wasn't sure where the signal type and altitude restriction in the definition came from, but radar altimeters are commonly continuous wave (modulated perhaps) not pulse, and, if you consider terrain avoidance and terrain contour mapping, routinely are used for tactical missions at 30 meters or so. Howard C. Berkowitz 17:13, 11 September 2009 (UTC)

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