Susan Skone, University of Calgary, Calgary, AB, Canada, Anthea Coster, MIT Haystack Observatory, Westford, MA, United States, Keith M Groves, Boston College, Institute for Scientific Research, Chestnut Hill, MA, United States, Jonathan J Makela, University of Illinois, Urbana, IL, United States, Ethan S Miller, JHU/APL, Laurel, MD, United States and Roger H Varney, SRI International Menlo Park, Menlo Park, CA, United States