Dicke Radiometer

A Dicke radiometer is a sensitive instrument used to measure faint radio signals, often from space. It works by continuously comparing the signal from a target with a known reference, switching between the two rapidly. This process helps cancel out the receiver's internal noise, which can obscure weak signals. By analyzing the differences, the radiometer can accurately detect and measure very faint radio emissions. It's widely used in radio astronomy and satellite communications to improve measurement accuracy in noisy environments.