caa a22 4500 445302186 CHVBK 20180317142601.0 cr unu---uuuuu 170323e20100201xx s 000 0 eng 10.1134/S0001433810010159 doi (NATIONALLICENCE)springer-10.1134/S0001433810010159 Sergievskaya I. Institute of Applied Physics, Russian Academy of Sciences, ul.Ulyanova 46, 603950, Nizhni Novgorod, Russia aut Possibilities of using optical spectral analysis to estimate characteristics of roughness in the presence of films on the sea surface [Elektronische Daten] [I. Sergievskaya] The possibility of using an optical spectrum analyzer (OSA) to determine the degree of short gravity-capillary wave damping by films of surface-active substances (SAS) is studied. Nonlinear mechanisms of optical surface imaging associated with a complex profile of sky brightness and long waves are analyzed. Using the model of free short gravity waves damping by the films, it is shown that the difference between the contrast of roughness and imaging in film-covered surface regions can be substantial and attributed to a variability of the damping degree within a specified wavelength range rather than to the wave-damping value. In addition, it is illustrated that Doppler shifts of the OSA space-time spectrum in regions covered with films can substantially increase due to nonlinear distortions of the surface images. This fact should be taken into account when obtaining additional information on the state of the surface and roughness based on the Doppler shift values. Pleiades Publishing, Ltd., 2010 Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/1(2010-02-01), 121-127 0001-4338 46:1<121 2010 46 11485 https://doi.org/10.1134/S0001433810010159 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0001433810010159 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Sergievskaya I. Institute of Applied Physics, Russian Academy of Sciences, ul.Ulyanova 46, 603950, Nizhni Novgorod, Russia aut NATIONALLICENCE 773 0- Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/1(2010-02-01), 121-127 0001-4338 46:1<121 2010 46 11485 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer