A dynamical effect in the ionospheric F1 layer

Details A dynamical effect in the ionospheric F1 layer A dynamical effect in the ionospheric F1 layer

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26.1007t&link_type=abstract

Planetary and Space Science, vol. 26, Nov. 1978, p. 1007-1016.

Computer Science

Sound

6

Atmospheric Physics, F 1 Region, Incoherent Scattering, Ionospheric Sounding, Atmospheric Ionization, Atmospheric Models, Chemical Equilibrium, Ionospheric Drift, Photochemical Reactions, Recombination Reactions, Solar Activity Effects, Solar Terrestrial Interactions, Summer, Vertical Motion, Winter

Scientific paper

Incoherent scatter observations of the ionospheric F1 layer above Saint-Santin (44.6 deg N) are analyzed after correction of a systematic error at 165 and 180 km altitude. The daytime valley observed around 200 km during summer for low solar activity conditions is explained in terms of a downward ionization drift which reaches -30 m/s around 180 km. Experimental determinations of the ion drift confirm the theoretical characteristics required for the summer daytime valley as well as for the winter behavior without a valley. The computations require an effective dissociative recombination rate of 2.3 x 10 to the -7th(300/Te) to the 0.7(cu cm/s) and ionizing fluxes compatible with solar activity conditions at the time when the valley is observed.

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