Multi-band microwave radiometric sensing of remote rain zones

Abstract

This work relates to the problem of forecasting dangerous weather events - heavy rains and heavy precipitation in the form of snow and hail in a certain area based on the results of passive microwave radiometric measurements. The article presents the results of research on the possibility of implementing a multi-band method for detecting and monitoring rain zones with inclined microwave radiometric sensing at small angles. The analysis of the influence of a remote rain area on the atmosphere radio brightness temperature during horizontal sounding of a multi-frequency microwave radiometric system is performed. Numerical estimates of the radio brightness temperature and its increase due to the presence of the rain zone in the direction of sounding are obtained. The atmosphere with rain thermal radiation power measurements data, made by a tri-band microwave radiometric system, show a trend for different time of the system output growth formation, when the rain area approaches to the place-based microwave radiometric system.

Correlation analysis of the results of remote sensing of the atmosphere by a three-band microwave radiometric system

“…The structural diagram of the tri-band microwave radiometric system and the mode separator of the mirror antenna illuminator are shown in figures 1-2. From the results of measurements in three frequency ranges on seven channels -the values of output voltages of quadratic detectors with polling ADC with periodicity 0.1 s are formed data files for subsequent information processing [12].…”