Dr. Chappell has been involved in space science research related to the Earth's magnetosphere and ionosphere for almost 50 years. His career has included research at Lockheed Palo Alto Research Laboratory, NASA/Marshall Space Flight Center and Vanderbilt University. He has worked on particle data from satellite missions for his entire career and has been a Principal Investigator for instruments on two NASA spacecraft. He is the author of more than 125 published articles and has planned AGU conferences and sessions in his area of research. He has edited a conference proceeding and has written articles for encyclopedias. He has co-authored a book, "Worlds Apart" which examines the subject of science and the media. He has represented NASA in the media and has given hundred's of talks to public audiences.