Physics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32..515b&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 32, April 1984, p. 515-523.
Physics
11
Airglow, Auroras, Oxygen Spectra, Time Series Analysis, Atomic Excitations, Linear Filters
Scientific paper
A method of time-series analysis termed impulse-response estimation is described. The method is applied to simultaneous ground-based photometry measurements of the N2(+) 1NG band at 4278 A and the 5577-A line emission in order to estimate the response in 5577 A to a discrete impulse in excitation rate. From these impulse-response estimates the contribution from indirect excitation processes to the O(1S) state is estimated to be of the order of 80 percent and the lifetime of the associated intermediate species to be approximately 0.1 s. Effective lifetimes for the O(1S) excited state are obtained in the range 0.49-0.86 s with a distribution showing a sharp cutoff at 0.8 s and a mean of 0.71 s.
Burns Gary B.
Reid Jeffrey S.
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