Fine-scale features on the sea surface in SAR satellite imagery – Part 1: Simultaneous in-situ measurements
A. Soloviev1, C. Maingot1, S. Matt1, R. E. Dodge1, S. Lehner2, D. Velotto2, S. Brusch2, W. Perrie3, and E. Hochberg41Nova Southeastern University's Oceanographic Center, Dania Beach, USA 2German Aerospace Center, Wessling, Germany 3Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada 4Bermuda Institute of Ocean Sciences, St. George's, Bermuda
Received: 11 Jul 2012 – Accepted for review: 12 Aug 2012 – Discussion started: 17 Sep 2012
Abstract. This work is aimed at identifying the origin of fine-scale features on the sea surface in synthetic aperture radar (SAR) imagery with the help of in-situ measurements as well as numerical models (presented in a companion paper). We are interested in natural and artificial features starting from the horizontal scale of the upper ocean mixed layer, around 30–50 m. These features are often associated with three-dimensional upper ocean dynamics. We have conducted a number of studies involving in-situ observations in the Straits of Florida during SAR satellite overpass. The data include examples of sharp frontal interfaces, wakes of surface ships, internal wave signatures, as well as slicks of artificial and natural origin. Atmospheric processes, such as squall lines and rain cells, produced prominent signatures on the sea surface. This data has allowed us to test an approach for distinguishing between natural and artificial features and atmospheric influences in SAR images that is based on a co-polarized phase difference filter.
Soloviev, A., Maingot, C., Matt, S., Dodge, R. E., Lehner, S., Velotto, D., Brusch, S., Perrie, W., and Hochberg, E.: Fine-scale features on the sea surface in SAR satellite imagery – Part 1: Simultaneous in-situ measurements, Ocean Sci. Discuss., 9, 2885-2914, doi:10.5194/osd-9-2885-2012, 2012.