Possibilities of using optical spectral analysis to estimate characteristics of roughness in the presence of films on the sea surface

Autor:	I. A. Sergievskaya
Rok vydání:	2010
Předmět:	Surface (mathematics) Physics Atmospheric Science Gravitational wave business.industry media_common.quotation_subject Surface finish Oceanography Degree (temperature) Nonlinear system symbols.namesake Optics Sky brightness symbols Contrast (vision) business Doppler effect media_common
Zdroj:	Izvestiya, Atmospheric and Oceanic Physics. 46:121-127
ISSN:	1555-628X 0001-4338
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::79f1cca0a49532d9df48911260e7d8a9 https://doi.org/10.1134/s0001433810010159 Zobrazit plný text záznamu Full text from SpringerLink