Scientists employed a new radar satellite technique - a new way to obtain information to understand the strength and variability of surface current and their significance on climate change.
The new method was demonstrated on data by scientists at the SeaSAR 2008 workshop, which was held in ESRIN, ESA's European Centre for Earth Observation in Frascati, Italy. From the Advanced Synthetic Aperture Radar (ASAR) instrument aboard ESA’s Envisat, it can measure the speed of the moving surface.
Dr. Bertrand Chapron of the French Research Institute for Exploitation of the Sea (IFREMER) first demonstrated the concept in 2005 with initial tests carried out over the Gulf Stream. However, careful validation was not possible. Through the upgraded ESA's ASAR ground segment in July 2007, they were able to systematically process and disseminate a Doppler grid product which helps produce a Doppler shift embedded in the radar signal.
Basics & Backgrounds
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