Figure 6. Observed green intensities and model fits for the 25 May 2020
green ghost sprite. The ordinate is in arbitrary units, and the abscissa
is in ms from the onset of the sprite.
The proposed model for the green ghost fits the observations
surprisingly well given its simplicity. The main fitting problem between
model and observations is in box 6 and 7 of the 24 May 2020 event where
the observed initial rise is later that the model predicts. There could
be an issue with the background subtraction, or the assumed electric
field might be established later at the lower altitude represented by
box 6 and 7.
To allow some quantitative assessment of the analysis and model we list
key parameters for the analysis of the two events: