Open AccessCalibration of a three-band microwave radiometric system by an external noise signal source
Author(s) -
E. V. Fedoseeva,
I. N. Rostokin,
E. A. Rostokina,
G. G. Shchukin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1991/1/012027
Subject(s) - noise temperature , optics , microwave , noise (video) , calibration , physics , noise floor , signal (programming language) , radiometric calibration , radiometry , antenna noise temperature , noise generator , antenna (radio) , remote sensing , acoustics , noise measurement , noise figure , computer science , telecommunications , antenna aperture , bandwidth (computing) , geology , radiation pattern , noise reduction , phase noise , artificial intelligence , image (mathematics) , amplifier , quantum mechanics , programming language
The article considers a method of solving the problem of calibration of a tri-band microwave radiometric system by an external source of noise signal. The peculiarity of the given method of calibration is the location of the calibrated noise signal source in the base of the common antenna mirror with reception to the common aperture of the system’s illuminator. The questions of technical realization of a noise source as a broadband noise generator taking into account frequency dependence of output noise power value supplemented by an attenuator for obtaining a two-level calibration signal are considered. In article the theoretical positions underlying the given way of calibration in values of measured radio-luminous temperature are resulted, and time dependences of measurements of radio-luminous temperature of atmosphere are shown at an antenna direction in a zenith with inclusion of an external source of a noise signal at performance of calibration of microwave radiometric system.