Abstract
The possibilities of electrodynamic model of relict radiation scattering by vegetation cover to improve the accuracy of soil characteristics measurement by microwave radiometer are demonstrated. The dependence of the reflective characteristics of the soil-vegetation system on the type and parameters of vegetation cover is considered. The accuracy of measuring the radio brightness temperature of the soil is estimated depending on the type and characteristics of the vegetation cover.
Highlights
Measuring the soil moisture and surface temperature using a microwave radiometer [1], vegetation cover significantly influence on the measurement results [2], as vegetation partially reflects and partially absorbs the relict radiation of the celestial sphere, as well as shields its own radiothermal radiation of the soil
Taking into account the influence of vegetation cover to clarify the results of measuring soil moisture and temperature is an urgent task and requires the development of new methods for modeling the interaction of an electromagnetic wave with the surface of the earth covered with vegetation L-band microwave radiometer, designed for remote measurement of soil moisture in a layer up to one meter depth from the board of the unmanned helicopter
Microwave radiometer antenna, located on unmanned helicopter, directs to the earth surface so that the antenna paten axis have some angle with vertical line
Summary
Measuring the soil moisture and surface temperature using a microwave radiometer [1], vegetation cover significantly influence on the measurement results [2], as vegetation partially reflects and partially absorbs the relict radiation of the celestial sphere, as well as shields its own radiothermal radiation of the soil. Microwave radiometer antenna, located on unmanned helicopter, directs to the earth surface so that the antenna paten axis have some angle with vertical line. To improve the accuracy it is necessary to regard the scattering relict emission on vegetation and the absorption soil emitted wave in vegetation This is difficult problem not completely solved up to current moment. To show the results of such modeling in simplest case is the purpose of this article
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