Figure 3
From: Surfactant-associated bacteria in the near-surface layer of the ocean
Case study on July 10, 2010 in the Straits of Florida.
(a) Photographic image of a slick. The glossy area represents the slick. (b) SAR image of the sampling areas captured with the RADARSAT-2 satellite at 11:23 UTC on July 10, 2010. The image is in C-band VV-polarization. The corresponding operational beam mode is fine quad-polarization mode. The incidence angle is between 26.9 (near) –28.7° (far) and the resolutions in range and azimuth directions are 5.4 and 8.0 m. A 3*3 Lee Filter was applied to reduce the speckle existing on the SAR image. The radiometric error for RADARSAT-2 fine quad-polarization imaging model is smaller than 1 dB. Slicks appear in the respective SAR image as dark lines. The study site was located approximately 8 km off the Atlantic Coast of Fort Lauderdale, Florida; wind speed was around 1.8–2.6 ms−1; wind direction, 240–260o. 1 – Slick sampling, sea surface microlayer. 2 – Slick sampling, subsurface. 3 – Non-slick sampling, sea surface microlayer. 4 – Non-slick sampling, subsurface.
