Радиометр водяного пара - средство измерений радиояркостной температуры атмосферы

Abstract

The results of experimental studies of measurement error of radio brightness temperature of the atmosphere at frequencies of 20,7 GHz and 31,4 GHz in the vicinity of water vapor emission lines by water vapor radiometer are presented. Measurement accuracy brightness temperature have assessed at the place of dislocation water vapor radiometer in Observatory «Zelenchukskaya» by using of wide-aperture low-temperature noise generator PNShI200 - working standard of unit of equivalent noise temperature. By results of measurements performed to evaluate the accuracy of measurement brightness temperature of the atmosphere by water vapor radiometer, the requirements to radio-physical characteristics and to accuracy requirements for unit of noise temperature reproducibility by perspective wide-aperture low-temperature noise generators were formulated.