Computer Science – Sound
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.6799r&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, June 1, 1989, p. 6799-6815.
Computer Science
Sound
29
Auroral Zones, Earth Ionosphere, Electron Precipitation, Ultraviolet Spectroscopy, Visible Spectrum, Airborne Equipment, Electron Impact, Nitrogen, Satellite Sounding
Scientific paper
Electron-impact excitation rates for several bands of N2 and N2(+), bands of O2 and O2(+), and for several states of O and O(+) in the visible and UV were computed by solving the complete electron transport equation. The theoretical results were tested by comparing the predicted emission rate ratios N2 2PG(0,0)/N2(+) 1NG(0,1) to ratios derived from photometer measurements of I(3371 A) and I(4278 A), acquired over many hours of observations from a high-flying aircraft. Results show that the ratio I(3371 A)/I(4278 A) is a better indicator of the characteristic energy of the electron spectrum than the commonly used so-called 'red-to-blue' ratio, I(6300 A)/I(4278 A). It was also found that the model predictions and the results of air-borne observations of the I(3371 A)/I(4278 A) ratio show poor agreement with results obtained from rocket-borne photometers, satellite-borne photometers, and an air-borne spectrometer.
Lummerzheim Dirk
Rees Manfred H.
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