Mathematics
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jatp...46..399f&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 46, May 1984, p. 399-402.
Mathematics
1
D Region, Data Reduction, E Region, Ionospheric Propagation, Radio Probing, Collision Parameters, Frequency Response, Functions (Mathematics), Invariance, Ionospheric Electron Density
Scientific paper
The validity and applicability of the Phi function used by George (1971) in the reduction of ionospheric absorption data obtained by the pulse-reflection method (A1) of vertical-incidence sounding are investigated. A limiting-collision theory of ionospheric radio-wave absorption is developed; profiles of electron density and collision frequency are constructed; and total absorption is calculated as a function of frequency, season, and solar epoch for nine stations distributed in latitude from the equator to the auroral zone. The total absorption is then used to compute Phi, and the results are presented in graphs: Phi is shown to be latitude-independent and a valid tool for data reduction. No basis is found for the low-latitude correction proposed by Dyson and Bennett (1979).
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