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The work belongs to the field of solving problems related to the metrological support of microwave radiometric research of radiothermal radiation of the atmosphere. The article contains a comparative analysis of the most widely used reference sources of noise radiation used both for internal and external calibration of microwave radiometric equipment for atmosphere control. In the given work the research of a method of external calibration of the antenna system of multifrequency microwave radiometric system with compensation of background noise on radiothermal radiation of the Sun is executed, questions of its practical realization are solved and results of an estimation of directional properties of the antenna system of microwave radiometric system on radiothermal radiation of the Sun are received. The results of practical research of the directional properties of the antenna system of a stationary variant of the multi-frequency microwave radiometric system, consisting in measuring the experimental antenna radiation pattern of the multi-frequency two-mode antenna system on the main measuring channel on two linear polarization (vertical and horizontal) and additional measuring channel with a predominant reception of background radiation coming from the side lobes are presented.

journal of physics. conference series

Use of the Sun’s radiothermal radiation as an external source for research of multi-frequency microwave radiometric system antenna parameters with background noise compensation