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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2023, Vol. 20, No. 3, pp. 222-229

Registration of plastic flow autowaves in ice structures in radar measurements

A.A. Gurulev 1 , G.S. Bordonskiy 1 , A.O. Orlov 1 
1 Institute of Natural Resources, Ecology and Cryology SB RAS, Chita, Russia
Accepted: 27.04.2023
DOI: 10.21046/2070-7401-2023-20-3-222-229
The paper considers radar peculiarities of ice structures state during plastic deformation. The peculiarities are based on determining the increase in intensity of scattered microwave radiation in a selected spectral interval — at frequencies of 13–14 GHz. The effect is determined by the wavelength of plastic flow autowaves, with a characteristic value of the order of one centimeter. Autowaves form chaotically distributed sets of diffraction gratings in ice, which change in time under the action of mechanical stresses. During analysis of Sentinel-1B satellite radar images of ice cover of Lake Shakshinskoe (Trans-Baikal Territory), one of them showed an increased value of the backscattering coefficient. The effect is associated with the manifestation of plastic flow autowaves during strong diurnal changes in the thermodynamic temperature of the ice cover. It is proposed to use the method of radar registration of current waves to detect a precursor of descent of pulsating glaciers in the form of increased scattered radiation from an object revealed in comparative measurements.
Keywords: microwaves, ice structures, plastic flow autowaves, ice fluidity, radar
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