Physics
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26..131p&link_type=abstract
Planetary and Space Science, vol. 26, Feb. 1978, p. 131-138.
Physics
Energy Spectra, Photoelectrons, Radiative Transfer, Upper Atmosphere, Angular Distribution, Electron Energy, Isotropy, Particle Collisions, Spatial Distribution
Scientific paper
A technique for solving the problem of photoelectron spatial transport and spectral degradation is presented. The developed model, which allows for a relatively complete description of the relevant transport and collisional physics, can be applied to study processes at either low or high altitude, and may be used to investigate interhemispheric transport. The technique involves dividing the spatial dimension into a set of discrete ordinates and calculating the photoelectron intensity for a specific energy at each point in space and at a set of angle points. The selected range of the energy spectrum was covered completely by a set of energy bins, and the photoelectron intensity in the highest energy bin was calculated first by assuming that the only source term was derived from photoionization. The method is similar to a method used in radiative transfer theory. Spatial and angular redistribution of electrons play a dominant role at heights above 400 km.
McElroy Michael B.
Prather Michael J.
Rodríguez Jacquelin
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