William L. Melvin currently serves as Chief Scientist and Technical Fellow, Sensors Division, at Systems and Technology Research (STR), USA. He served on the USAF Science Advisory Board, the Board on Army Science and Technology, the Air Force Studies Board on Developmental Planning organized through the National Academy of Science, and the White House-DoD American Mid-Band Initiative Team.Mark A. Richards is an independent consultant with over 35 years' experience in radar signal processing, having recently retired as professor from Georgia Institute of Technology's School of Electrical and Computer Engineering. He was Chief of the Radar Systems Division in the Georgia Tech Research Institute's Sensors and Electromagnetic Applications Laboratory, and for two years Program Manager at DARPA. Dr. Richards is a Fellow of the IEEE, cited "for contributions to radar signal processing education".