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This paper investigates the impact of the soil moisture distribution in the top layer on the accuracy of soil moisture retrieval by microwave remote sensing methods. We modeled soil emission at L-band by coherent and noncoherent models for the different moisture distributions in the top layer. As a result, it is found that, at high moisture gradients, the difference between average moisture within...
In this paper, the results of measurements in the frequency range from 10 MHz to 1.0 GHz of the complex dielectric permittivity for some moist artificial soil, that is, mixtures consisting of quartz sand and bentonite clay components, with varying particle-size distributions, are discussed. The measurements were conducted with the use of coaxial line and capacitor probes in conjunction with a vector...
In this paper are presented the results of experimental observation and theoretical simulation for the diurnal dynamics of radiobrightness at frequencies of 1.4 and 6.9 GHz in the process of topsoil cyclic freezing and thawing. Using the radiobrightnesses observed, the dynamics of the freezing layer thickness have been determined and the phenomenon of nonisothermal transport of moisture through the...
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