ASAR Product for April 29, 2010 (IMAGE) European Space Agency Caption In this Envisat Advanced Synthetic Aperture Radar (ASAR) product for April 29, 2010, advanced processing methods have been performed to display ocean surface roughness variations and Doppler-derived ocean surface radial velocities around the oil spill area in the Gulf of Mexico. Smooth surfaces appear as black patches inside the oil spill and in the very low wind region east of the spill, where the flow analysis is not possible. As visible, the spill still appears relatively confined around its point of origin and is still north of the Loop Current. Credit CLS Usage Restrictions For non-commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.