New Radar Altimeter Missions are Providing a Dramatically Sharper Image of Global Marine Tectonics

David T Sandwell1, Dietmar Müller2, Emmanuel Garcia1, Kara J Matthews3, Walter H F Smith4, Edward D. Zaron5, Shengjun Zhang6, Dan Bassett1 and Richard Francis7, (1)University of California San Diego, La Jolla, CA, United States, (2)University of Sydney, Sydney, NSW, Australia, (3)University of Calgary, Calgary, AB, Canada, (4)NOAA College Park, College Park, United States, (5)Portland State University, Portland, OR, United States, (6)Northeastern University, School of Resources and Civil Engineering, Boston, MA, United States, (7)ESA/ESTEC, Noordwijk, Netherlands