radar frequency band
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.
They all fall within the UHF
, and EHF
radio frequency bands. The bands normally used for radar
detection of precipitation
are the following.
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
bands. Compare radio frequency band
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