Comments on the interpretation of 3371 Å filter-photometer observations and its implications for the AE-E photoelectron fluxes |
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Authors: | R.R. Conway |
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Affiliation: | E.O. Hulburt Center for Space Research Naval Research Laboratory Washington, D.C. 20375 USA |
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Abstract: | Modeling of the dayglow spectrum in the wavelength region between 3300 and 3500 Å indicates that the N2 second positive (0,0) band at 3371 Å is blended with the Vegard-Kaplan (0,9) band. A recent analysis of rocket observations of the dayglow shows that 20–30% of a 3371 Å narrow band filter-photometer signal is due to the VK emission (Conway and Christensen, 1983). Kopp (1977) and Hernandez (1983) reported analyses of 3371 Å photometer observations from the Visible Airglow Experiment on the Atmospheric Explorer-C (AE-C) satellite which did not consider the Vegard-Kaplan (VK) emission. The observations were compared to theoretical estimates of the second positive volume emission rate based on a photoelectron model and on absolute fluxes measured by the Photoelectron Spectrometer experiments on AE-C and AE-E. Inclusion of the VK band in the AE analysis would bring the reported photoelectron theory into agreement with the airglow observations. However, the overestimate of the N2 second positive airglow predicted by the AE-E photoelectron flux measurements increases to a factor of nearly two rather than the 20–30% reported by Hernandez (1983). |
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