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Old 25th Nov 2008, 17:03
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zkdli
 
Join Date: Jul 2002
Location: united kingdom
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Philkby,
The difficulty with radar is that the equipment has what is known as a radar lobe - this is the coverage of the radar signal and can be thought of as a donut shape originating from the radar head. Not all radar lobes reach 90,000ft.
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