Data and Analysis
The two Green Ghost events were recorded at 30 fps on 24 and 25 May 2020
at Heliotown Observatory in Lamy, NM (35.5028N, -105.8936E) using a SONY
A7s II in video mode. The sprite on 24 May 2020 was at 03:31:22 UT, and
the sprite on 25 May 2020 was at 03:55:19 UT. In both events the green
ghost appears in the top of a large sprite and lasts about a second
after the sprite has turned off. The 24 May sprite has 24 frames (0.7 s)
and the sprite on 25 May has 36 frames (1.2 s) with sprite and ghost
features. The videos can be viewed at
https://vimeo.com/422073242
(24 May 2020)and
https://vimeo.com/423369251
(25 May 2020).
Figure 2 shows six frames from the 25 May 2020 event. The main sprite
lasts 2 frames. After turn-off, t = 66 ms, a faint green ghost is
present in the area of the top of the sprite. The ghost brightens
reaching maximum at frame 8, t= 166 ms, and decays after that. The event
on the previous day, 24 May 2020, was very similar.