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| | | #REDIRECT: [[Radar frequency band]] |
| #REDIRECT [[radar frequency band]] | |
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| == radar frequency band ==
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| <div class="definition"><div class="short_definition">A frequency band of [[microwave radiation]] within which radars operate. The radar frequency bands were first designated by code letters for secrecy during World War II; these letters are still in common use, although the exact [[frequency]] intervals to which they apply have undergone some redefinition.</div><br/> <div class="paragraph">They all fall within the [[UHF]], [[SHF]], and [[EHF]] radio frequency bands. The bands normally used for [[radar]] detection of [[precipitation]] and [[clouds]] are the following.[[File:ams2001glos-Rt1.gif|link=|center|ams2001glos-Rt1]]Radars operating in the S, C, and X bands are the ones mainly used for precipitation measurements. Attenuation of the transmitted [[radio frequency]] energy by atmospheric gases, precipitation, and cloud particles is severe for all frequency bands higher than X band, and even X band can suffer severe [[attenuation]] in [[heavy rain]]. Nevertheless, because radars operating in the K, Ka, and W bands are able to detect clouds, they are used for cloud observations even though they are not able to penetrate far through precipitation. Radar [[wind profilers]] and [[MST radars]] operate at lower frequencies than those included in this table, namely, in the [[UHF]] and [[VHF]] bands. <br/>''Compare'' [[radio frequency band]].</div><br/> </div>
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