Riometer
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- (Relative Ionospheric Opacity meter). A specially designed radio receiver for continuous monitoring of cosmic noise. The absorption of cosmic noise in the polar regions is very sensitive to the solar low-energy cosmic ray flux
NOAA National Weather Service - Cite This Source - This Definition - burst, Centimeter Burst, Cosmic Ray, Microwave Burst, Radio Emission, Type I, II, III, IV, U Burst, X-Ray Background, X-Ray Burst, X-Ray Flare Class