Appleton layer
see under .
the highest of the radio-reflective ionospheric layers, beginning at an alt-tude of about 80 miles (130 km) and consisting of two parts, the lower part (f layer) being detectable in the daytime only, the higher (f layer or appleton layer) being constant and const-tuting the ionospheric layer most favorable for long-range radio communication.
noun
the f region of the ionosphere
f layer
see f region.
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or capable of being ; relevant; suitable; appropriate: an applicable rule; a solution that is applicable to the problem. contemporary examples but that crime should be applicable only to conduct that occurs after the new law is enacted. the fallacy of ‘fraud’ alan m. dershowitz april 16, 2010 libertarian political principles must be applicable to […]