Spatial-temporal development of molecular releases capable of creating large-scale F-region holes

Details Spatial-temporal development of molecular releases capable of creating large-scale F-region holes Spatial-temporal development of molecular releases capable of creating large-scale F-region holes

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ampm.agarq....m&link_type=abstract

In AGARD Artificial Modification of Propagation Media 8 p (SEE N77-19530 10-42)

Computer Science

F Region, Holes (Electron Deficiencies), Molecular Diffusion, Spatial Distribution, Plumes, Saturn 5 Launch Vehicles, Skylab Program, Solar Cycles

Scientific paper

Diffusion in an exponential atmosphere, with and without chemical loss processes for the diffusing substance, and for a variety of possible release heights and solar cycle conditions is under study. Since the amounts of material capable of injection into the F-region are under most projected circumstances, much less than the 1 ton/second of exhaust ejected by the Saturn V second stage engines during the Skylab launch, a thorough analysis of the diffusion process was done for any prediction of the types of smaller holes which can be created. To a first approximation, the rate of decrease of electrons at any particular time and distance from the release point is proportional to the instantaneous concentration of the diffusing substance. The results for diffusion of molecular hydrogen (one of the highly reactive molecules capable of creating F-region holes) shows that chemical loss by atomic oxygen severely affects the expansion of the released gas by creating a chemical sink in the lower thermosphere which competes with diffusion.

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