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Forward and Backscatter of RF Waves by Spherical Overdense Clouds for Several Electron Density Distributions
Author(s) -
Klein Milton M.
Publication year - 1971
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs006i012p01045
Subject(s) - backscatter (email) , physics , gaussian , inverse , cross section (physics) , square (algebra) , optics , center (category theory) , inverse square law , distribution (mathematics) , computational physics , geometry , mathematical analysis , mathematics , classical mechanics , quantum mechanics , telecommunications , chemistry , computer science , gravitation , wireless , crystallography
A determination, in geometric optics approximation, of the forward and backscatter characteristics of spherical overdense clouds having (1) a Gaussian decrease with distance from the center, (2) a sech 2 , or exponential, decay, and (3) an inverse‐square decrease, showed that the backscatter cross section for the inverse‐square distribution is always larger than for the other two distributions. As the center‐point density increases, the backscatter cross section obtained with the Gaussian sphere most rapidly takes on the characteristics of a conducting sphere, that of the sech 2 distribution lags slightly behind, but that of the inverse‐square sphere never gets close to the result for a conducting sphere. In forward scatter, the inverse‐square distribution shows the largest cross section and a fairly rapid increase with center‐point density, the sech 2 distribution has an essentially constant cross section, and the Gaussian, which has the lowest forward scatter cross section, shows a slight decrease with center‐point density.