Figure 1. Green emissions in the top of a sprite.
In early 2020 Dr. L. McDonald, who leads a “Citizen Scientist” program
at NASA/GSFC, connected sprite observer Mr. T. Ashcraft with the
University of Alaska Fairbanks/US Air Force Academy sprite research
team. One of his sprite images with green emissions in the top is shown
in Figure 1. On 24 and 25 May 2020 Mr. Ashcraft made two recordings of
sprites with Green Ghosts and these recordings provide the data for this
AGU 2020 poster.