Effective electron collision frequency measurements in the E- and F-regions

Details Effective electron collision frequency measurements in the E- and F-regions Effective electron collision frequency measurements in the E- and F-regions

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50...45b&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 50, Jan. 1988, p. 45-49. Research supported by the Radio R

Physics

1

Collision Rates, E Region, Earth Ionosphere, F Region, Magnetohydrodynamic Stability, Atmospheric Attenuation, Atmospheric Models, Radio Transmission

Scientific paper

The collision frequency nu in the ionosphere has often been determined by measuring differences in the amplitude and group path of two closely spaced signals reflected in the region of high group retardation. In this paper, a method of measuring nu using a CW double-side-band modulated signal reflected obliquely in the ionosphere is described. This allows nu to be determined on a continuous basis; it is found that the value of nu obtained is 10,000-50,000/s for the E-region and about 1,000/s for the F-region. It is shown that measurements made just after sunset, when the E-region is still present, are more representative of E-region values than F-region.

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