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Ionospheric refraction effects in slant range profiles of auroral HF coherent echoes
Author(s) -
Uspensky M. V.,
Kustov A. V.,
Sofko G. J.,
Koehler J. A.,
Villain J. P.,
Hanuise C.,
Ruohoniemi J. M.,
Williams P. J. S.
Publication year - 1994
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 - 10.1029/93rs03256
Subject(s) - ionosphere , doppler effect , radar , refraction , coherent backscattering , incoherent scatter , atmospheric refraction , range (aeronautics) , geology , intensity (physics) , scattering , physics , doppler radar , optics , remote sensing , geophysics , materials science , composite material , telecommunications , astronomy , computer science
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. Satisfactory agreement is found between theory and experiment for the intensity profiles. However, there are significant discrepancies for the Doppler velocity profiles. We discuss this lack of agreement in light of other recent observations.