An examination of the dynamics of North American mid-latitude sporadic-E

Bharat Kunduri, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States, Philip John Erickson, MIT Haystack Observatory, Westford, MA, United States, Joseph B. H. Baker, Virginia Tech, Blacksburg, VA, United States and J. Michael Ruohoniemi, Virginia Polytechnic Institute and State University, Blacksburg, United States