An Auroral Enhancement of O2λ1.27-μm Emission
Planetary and Space Science
The ground-level zenith radiance of the atmospheric emission at λ1.27 μm was radiometrically observed to increase by a factor of approximately two with the onset of an IBC III+ auroral breakup above Chatanika, Alaska, on 10 March 1975. Time-resolved optical spectra clearly show that the slow component of the enhancement is associated with the (0,0) band of the infrared atmospheric system of O2. Photometric and incoherent scatter radar data are used to define the energy-deposition profile and the absolute energy flux for the event. The magnitude of the O2λ1.27-μm enhancement compares favourably with the predictions of an auroral excitation model which includes only secondary-electron excitation of molecular oxygen in the O2(a1Δg) source term.
Doran J. Baker, William R. Pendleton Jr., Gerald J. Romick, Vincent B. Wickwar, Murray I. Baron, An auroral enhancement of O2λ1.27-μm emission, Planetary and Space Science, Volume 26, Issue 7, July 1978, Pages 619-634, ISSN 0032-0633, 10.1016/0032-0633(78)90096-X. (http://www.sciencedirect.com/science/article/pii/003206337890096X)