Conclusion
We have presented a model for the sprite green ghost based on the emissions being the auroral green line at 557.7 nm and an assumed lightning associated electric field decaying exponentially. The model can fit the observations of a two green ghosts made 24 and 25 May 2020 from Lamy, NM, lending support to the suggestion that the emissions are indeed from atomic oxygen. The observation that the green ghost has maximum intensity well after the main sprite has turned off combined with the observed green emission decay time constant being significantly larger than time constants calculated based on formulas and rate constants given by Vallance Jones (1974) indicate the presence of processes lasting well after the main sprite has turned off.