Abstract
The launch of the Dual-frequency Precipitation Radar (DPR) opens up new opportunities for studying and monitoring the land and inland waters. It is the first time radar with a swath (±65°) covering regions with cold climate where waters are covered with ice and land with snow for prolonged periods of time has been used. It is also the first time that the remote sensing is carried out at small incidence angles (less than 19°) at two frequencies (13.6 and 35.5 GHz). The high spatial resolution (4–5 km) significantly increases the number of objects that can be studied using the new radar. Ilmen Lake is chosen as the first test object for the development of complex programs for processing and analyzing data obtained by the DPR. The problem of diagnostics of ice-cover formation and destruction according to DPR data has been considered. It is shown that the dependence of the radar backscatter cross section on the incidence angle for autumn ice is different from that of spring ice, and can be used for classification. A comparison with scattering on the water surface has shown that, at incidence angles exceeding 10°, it is possible to discern all three types of reflecting surfaces: open water, autumn ice, and spring ice, under the condition of making repeated measurements to avoid possible ambiguity caused by wind.
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Original Russian Text © V.Yu. Karaev, M.A. Panfilova, Yu.A. Titchenko, E.M. Meshkov, G.N. Balandina, Z.V. Andreeva, 2017, published in Issledovanie Zemli iz Kosmosa, 2017, No. 3, pp. 30–39.
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Karaev, V.Y., Panfilova, M.A., Titchenko, Y.A. et al. The First Results of Monitoring the Formation and Destruction of the Ice Cover in Winter 2014–2015 on Ilmen Lake according to the Measurements of Dual-Frequency Precipitation Radar. Izv. Atmos. Ocean. Phys. 53, 1050–1059 (2017). https://doi.org/10.1134/S0001433817090146
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DOI: https://doi.org/10.1134/S0001433817090146