Chris Ruf is Professor of Atmospheric Science and Electrical Engineering and Director of the Space Physics Research Laboratory (SPRL) at the University of Michigan. SPRL is a research unit in the Dept. of Atmospheric, Oceanic and Space Sciences specializing in the fabrication of spaceborne scientific instruments. He has worked previously at Intel Corporation, Hughes Space and Communications, the NASA Jet Propulsion Laboratory, Penn State University, and the Technical University of Denmark. His research focuses on microwave remote sensing with an emphasis on spaceborne microwave radiometer design, calibration and system engineering, and the development and validation of ocean and atmosphere geophysical inversion algorithms. He is also involved with related technology development efforts in the areas of digital correlation and high order moment radiometry, fully polarimetric calibration standards, and software beam steered imaging using synthetic aperture interferometry. Dr. Ruf has served on the Editorial Boards of the AGU Radio Science and AMS Journal of Atmospheric and Oceanic Technology. He has been the recipient of three NASA Certificates of Recognition and four NASA Group Achievement Awards, as well as the 1997 TGRS Prize Paper Award, the 1999 IEEE Resnik Technical Field Award, and the IGARSS 2006 Symposium Prize Paper Award.