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Sensors 2008, 8(6), 3780-3801; doi:10.3390/s8063780
Article
The Effect of Sea Surface Slicks on the Doppler Spectrum Width of a Backscattered Microwave Signal
Institute of Applied Physics, Russian Academy of Science, 46 Ulyanov Str., Nizhny Novgorod, 603950, Russia
* Author to whom correspondence should be addressed.
Received: 12 March 2008; in revised form: 31 May 2008 / Accepted: 2 June 2008 / Published: 6 June 2008
(This article belongs to the Special Issue Ocean Remote Sensing)
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Abstract: The influence of a surface-active substance (SAS) film on the Doppler spectrum width at small incidence angles is theoretically investigated for the first time for microwave radars with narrow-beam and knife-beam antenna patterns. It is shown that the requirements specified for the antenna system depend on the radar motion velocity. A narrow-beam antenna pattern should be used to detect slicks by an immobile radar, whereas radar with a knife-beam antenna pattern is needed for diagnostics from a moving platform. The study has revealed that the slick contrast in the Doppler spectrum width increases as the radar wavelength diminishes, thus it is preferable to utilize wavelengths not larger than 2 cm for solving diagnostic problems. The contrast in the Doppler spectrum width is generally weaker than that in the radar backscattering cross section; however, spatial and temporal fluctuations of the Doppler spectrum width are much weaker than those of the reflected signal power. This enables one to consider the Doppler spectrum as a promising indicator of slicks on water surface.
Keywords: The influence of a surface-active substance (SAS) film on the Doppler spectrum
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MDPI and ACS Style
Karaev, V.; Kanevsky, M.; Meshkov, E. The Effect of Sea Surface Slicks on the Doppler Spectrum Width of a Backscattered Microwave Signal. Sensors 2008, 8, 3780-3801.
AMA StyleKaraev V, Kanevsky M, Meshkov E. The Effect of Sea Surface Slicks on the Doppler Spectrum Width of a Backscattered Microwave Signal. Sensors. 2008; 8(6):3780-3801.
Chicago/Turabian StyleKaraev, Vladimir; Kanevsky, Mikhail; Meshkov, Eugeny. 2008. "The Effect of Sea Surface Slicks on the Doppler Spectrum Width of a Backscattered Microwave Signal." Sensors 8, no. 6: 3780-3801.