1994
DOI: 10.1029/93rs03256
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Ionospheric refraction effects in slant range profiles of auroral HF coherent echoes

Abstract: The theory of auroral coherent echoes developed for VHF scattering by Uspensky et al. (1988, 1989) is applied to the interpretation of intensity and Doppler velocity slant range profiles of HF radar aurora. The theoretical model includes the effects of irregularity aspect sensitivity, ionospheric refraction of the radar beam, and the reception of signals from different heights. The predicted profiles of HF radar aurora are compared with Schefferville HF radar observations in the frequency interval of 9–18 MHz.… Show more

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Cited by 38 publications
(59 citation statements)
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“…A good fit of the model and experimental data gives us additional confidence that the Uspensky et al (1994a) approach properly describes the way the auroral E-region echoes are formed at HF. One important conclusion of the model is that even for a spatially uniform ionosphere, HF E-region echo occurrence should be limited to certain distances of 150-250 km in their extent, even though ionospheric irregularities may exist over a much larger area.…”
Section: Discussionmentioning
confidence: 99%
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“…A good fit of the model and experimental data gives us additional confidence that the Uspensky et al (1994a) approach properly describes the way the auroral E-region echoes are formed at HF. One important conclusion of the model is that even for a spatially uniform ionosphere, HF E-region echo occurrence should be limited to certain distances of 150-250 km in their extent, even though ionospheric irregularities may exist over a much larger area.…”
Section: Discussionmentioning
confidence: 99%
“…The second velocity component from the out-of-cone irregularities was assumed to follow the simple linear fluid equation with altitudedependent collision frequencies (Fejer and Kelley, 1980). A similar approach was adopted by Uspensky et al (1994a). The E-region collision frequency profiles were based on EIS-CAT statistics, as described by Huuskonen (1989).…”
Section: Modeling Of Slant-range Profiles Of Echo Parametersmentioning
confidence: 99%
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“…Milan et al 2003a;Danskin et al 2004). Equally, a broad single peak might contain contributions from one instability type, but from a range of altitudes (Uspensky et al 1994). There is also interferometer evidence that different echo types arise from slightly differing altitudes within the E region (e.g.…”
Section: E-region Ionospheric Irregularitiesmentioning
confidence: 99%