Figure 1 - uploaded by Alexey Kuzmin
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Rough surface emissivity increment (in arbitrary units) as a function of: (a) electromagnetic to surface wavelength ratio; (b) incidence angle.
Source publication
The paper presents some results of the experiment CAPMOS'05 performed on an oceanographic research platform in the Black Sea. The platform located 600 m off shore was equipped with a set of contact and remote sensors. Conventional contact sensors were used for direct measurements of atmosphere and sea boundary layer parameters (wind speed and direc...
Context in source publication
Context 1
... wave number, Λ = 2π/K is surface wavelength, K is surface wave number, θ is incidence angle, ϕ is azimuth angle between surface K and electromagnetic k wave vectors, n = ±1, ±2, . . . is an order of the resonance. It is evident that for different relations between surface and electromagnetic wave length the resonance occurs at different angles. Fig. 1 illustrates the resonant increasing of periodically uneven water surface emissivity (in arbitrary units at Y -axis). Left panel shows the emissivity dependence on the ρ parameter at various incidence angles (that corresponds to the algorithm of the spectrum retrieval proposed in [5]), whereas right panel shows the similar dependence on ...
Citations
... Further, the brightness temperature dependence on incidence angle was used for the curvature spectrum of gravity-capillary waves retrieval. These results are presented in a separate paper [5]. Hereafter we will compare the results of gravity wave spectrum retrieval from radiometer and scatterometer data. ...
The paper presents the results of the experiment CAPMOS'05 performed at an offshore oceanographic platform in the Black Sea. The experiment was aimed at air-sea coupling investigations by means of direct and remote measurements. A specialized research platform managed by the Marine Hydrophysical Institute is located on the shelf slope approximately 600 m to the south of Crimea coast, Ukraine. Spectral parameters of wind and waves were estimated from direct and remote measurements. The peak frequency of the wind retrieved from radar measurements varied from 0.002 to 0.007 Hz, corresponding to wavelengths between 500 and 7000 m. The spectral peak frequency of gravity waves varied in the range from 0.2 to 0.7 Hz that corresponded to dominating wave lengths from 50 down to several meters. Comparison of two different techniques of wave spectrum retrieval from radar data, and also comparison of radar and radiometric data shows satisfactory agreement.
