Radioholographic antenna measurements with extraterrestrial sources

The interferometric (correlational) radioastronomical antenna measurements with terrestrial sources is a variant of the radioholographic method. This method, which is illustrated, requires a special two-channel correlational receiver and an additional tracking receiver. The radio source is combined with the tested source in an interferometer. As a signal source, one may use a variety of radio sources and satellites. The article presents some experimental results obtained from different antennas. The peculiarities of the measurements, using natural radio sources and satellites, are discussed.