статья в журнале

Ru

Sovremennye Problemy Distantsionnogo Zondirovaniya Zemli iz Kosmosa

ISSN:2070-7401
eSSN:2411-0280

2021

10.21046/2070-7401-2021-18-6-85-96

The work is devoted to demonstrating the possibility of retrieving bathymetry in the coastal zone of the Black Sea from satellite measurements in the optical range of the electromagnetic spectrum. The inverse problem of depth recovery is solved by determining the parameters of surface waves when they enter shallow water on the basis of linear wave theory. The satellite image was divided into blocks, within which the length and direction of the dominant wave were determined using a Fast Fourier transform. Further calculations were repeated in the direction of movement of the wave beam to the shore. The wave period in the first approximation is determined from the dispersion ratio for deep water and was considered constant along the wave beam. Using these estimates, the depth was determined using the dispersion ratio for shallow water in the first approximation. Further estimates of the period and depth were calculated by the method of successive iterations from the condition of minimizing the error in determining the radian frequency. The range of depths determined by the first method depends on the lengths of surface waves. With wave lengths of 30–40 m it is possible to restore depths down to 15–20 m, and when observing longer swell waves, the range of determined depths increases to 45 m. The use of this method is difficult in closed and/or wave-protected bays, because long waves do not penetrate into them, and short waves are not sensitive to changes in depth. © 2021 Space Research Institute of the Russian Academy of Sciences. All rights reserved.

Black Sea, Geoton, Resurs-P, Satellite derived bathymetry, Sentinel-2, СПУТНИКОВАЯ БАТИМЕТРИЯ, SENTINEL-2, «РЕСУРС-П», «ГЕОТОН», ЧЁРНОЕ МОРЕ

2022-01-31 14:49:41