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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, 2026, V. 23, No. 1, pp. 272-285

Sea surface emission generation conditions in the Katsiveli-25 experiment

I.N. Sadovsky 1, 2 , А.V. Kuzmin 1, 2 , D.S. Sazonov 1 
1 Space Research Institute RAS, Moscow, Russia
2 MIREA — Russian Technological University, Moscow, Russia
Accepted: 01.12.2025
DOI: 10.21046/2070-7401-2026-23-1-272-285
The paper presents the results of analysis of wind-wave parameters measurements obtained by the authors during the Katsiveli-25 experiment held in July–August 2025 on the stationary platform of Marine Hydrophysical Institute of the Russian Academy of Sciences located at the southern tip of the Crimean Peninsula. As part of the experiment, synchronous measurements of the spatial structure of wind waves and intensity of their microwave emission were carried out under conditions of dynamically changing wind action. A distinctive feature of the conducted research was the use of a laser wave recorder, developed by a team of MIREA — Russian Technological University, to determine the three-dimensional geometry of the interface between the sea surface and the atmosphere. In the three-point measurement mode with constant geometry, the wave recorder made it possible to determine: the general direction of wave propagation, the dispersion values of the slopes of large waves (with a spatial wavelength of more than 16 cm) along and across it, as well as the coefficients of excess and asymmetry of the resulting distributions. These wind wave characteristics are long-wave ones with respect to the 8-mm radiometers used in the experiment. The main objective of this publication is to highlight the features of wind wave formation at the geographic location of the experiment, which have the potential to influence emission of radiothermal radiation. This information will be further used to model microwave emission from the noted features, the most significant of which will be included in the theoretical radiation transfer model of the ocean-atmosphere system.
Keywords: in situ measurements, microwave emission, brightness contrast, two-scale model, wind waves, two-dimensional distribution of slopes, sea surface
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