Physics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12..279d&link_type=abstract
(Ionospheric and thermospheric studies; Proceedings of the Topical Meetings of the Interdisciplinary Scientific Commission P /Me
Physics
1
Atmospheric Models, Critical Frequencies, F 2 Region, Harmonic Analysis, Spherical Caps, Spherical Harmonics, Europe, Fourier Analysis, Legendre Functions
Scientific paper
The Haines et al. (1985) method of spherical cap harmonic (SCH) analysis has been applied to the critical frequency of the F2 layer observed at several European vertical incident ionospheric stations. The aim was the regional mapping and modeling of this parameter in Europe. To make it possible, a spherical cap including Europe, centered at 50 deg N, 14 deg E with the half-angle of 20 deg has been considered. The model is based on the expansion of Fourier longitudinal series and Legendre colatitudinal functions as the orthogonal basis functions over the caplike region of interest. It has been found that, for the modeling of the foF2, a SCH model with only 9 coefficients (K up to 2) well portrays its basic features.
Cander Lj R.
de Franceschi Giorgiana
de Santis Angelo
Zolesi Bruno
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