The amplitude of auroral backscatter. I - Model estimates of the dependence on electron density

Details The amplitude of auroral backscatter. I - Model estimates of the dependence on electron density The amplitude of auroral backscatter. I - Model estimates of the dependence on electron density

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50...73u&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 50, Jan. 1988, p. 73-79. Research supported by the Royal S

Computer Science

Sound

31

Atmospheric Models, Auroral Zones, Backscattering, Ionospheric Electron Density, Scattering Amplitude, Atmospheric Sounding, E Region, Vertical Distribution

Scientific paper

A model of the auroral backscatter amplitude, in the form discussed by Uspensky (1985) and Oksman et al. (1986), has been derived for the radar geometry appropriate to joint observations by the PGI auroral radars at Karmaselga and Essoyla and the EISCAT incoherent scatter radar. The model shows how refraction effects cause a strongly nonlinear dependence of backscatter amplitude on electron density in the E-region. It also explains why the macroaspect sensitivity for auroral radar operating at a frequency of about 45 MHz is only 1-2 dB per degree for aspect angles greater than 5 deg.

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