Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2020. No. 8
ContentsFull text in Russian (pdf)
DOI https://doi.org/10.30898/1684-1719.2020.8.15
UDC 621.369.9
Ultra-wideband impulse sensing of the layered structure of the snow-soil cover. Experimental research
K. V. Muzalevskiy, S. V. Fomin
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, Russia
The paper is received on August 20, 2020
Abstract. In this work, the processes of reflection of an ultrawideband (UWB) pulse with a duration of about 0.3 ns from thawed and frozen soil, during natural accumulation and melting of snow cover, were experimentally investigated. UWB pulses were synthesized on the basis of spectral measurements at horizontal polarization in the frequency range from 1.6 GHz to 8 GHz of the transmission coefficient between two horn antennas, the maxima of the radiation pattern of which were oriented at an angle of 35 to the normal, lowered onto a flat soil surface. Simultaneously with remote reflectometric measurements, contact measurements of the moisture and temperature profiles of the upper soil layer 0-17 cm, as well as the height and density of the snow cover were carried out. Experimental observations continued from November 8, 2019 to March 22, 2020. It is shown that the use of a UWB electromagnetic pulse with a duration of about 0.3 ns makes it possible to identify the thawed or frozen state of the soil at any time during the accumulation and melting of the snow cover (up to 30 cm high), as well as to estimate the value of the water equivalent of the snow cover with the standard deviation of 7.0 mm and the determination coefficient of 0.832. Experimental studies have shown that the development of pulsed UWB radar systems for remote sensing of the geophysical parameters of the layered structure of the snow-soil cover is promising.
Key words: radiolocation, ultra-wideband pulses, soil moisture, soil temperature, thawed and frozen state of the soil, snow cover, water equivalent of snow cover, dielectric constant.
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For citation:
Muzalevskiy K.V., Fomn S.V. Ultra-wideband impulse sensing of the layered structure of the snow-soil cover. Experimental research. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No.8. https://doi.org/10.30898/1684-1719.2020.8.15. (In Russian)