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Accession Number:
AD0745305
Title:
Annual and Sub-Annual Effects of EUV (Extreme Ultraviolet) Heating. Volume I. Harmonic Analysis,
Corporate Author:
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Report Date:
1972-04-15
Abstract:
The authors compute the rate of solar extreme ultraviolet radiation EUV heating in the upper atmosphere by photo-dissociation and photo-ionization, taking care to include properly the effects of oblique incidence of solar flux, sphericity of the atmosphere and ellipticity of the earths orbit. The time and latitudinal variations of the computed heat function are revealed by numerical Fourier analysis of the heat function into harmonics of the yearly cycle. It is shown that EUV absorption contains a latitude independent semi-annual component of heating with the proper phase to account for the semi-annual density variations. Further, the annual component of the heat function predicts the existence of summer polar density increases in the northern and southern hemispheres. Author
Supplementary Note:
See also AD-745 309.
Pages:
0039
Contract Number:
F04701-71-C-0172
File Size:
0.00MB
