Bistatic Auroral Radar System and three-receiver-ionospheric-motions velocities - A comparison

Details Bistatic Auroral Radar System and three-receiver-ionospheric-motions velocities - A comparison Bistatic Auroral Radar System and three-receiver-ionospheric-motions velocities - A comparison

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9515219m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Sept. 1, 1990, p. 15219-15226. Research supported by NSERC.

Other

3

Auroral Ionization, F Region, Ionospheric Disturbances, Multistatic Radar, Atmospheric Refraction, Backscattering, Laser Doppler Velocimeters

Scientific paper

Observations of the NW-SE component of F region convection obtained with a scintillation drift experiment have been compared with power and Doppler velocity measurements of auroral E region coherent backscatter at 50 MHz made with the Bistatic Auroral Radar System (BARS), which is able to observe only at large magnetic aspect angles. It was found that E region backscatter was observed only when the NW-SE component of the F region drift was in the SE direction. This and other observations are shown to be consistent with a recently proposed explanation for these large aspect angle VHF backscatter observations, based on refraction through auroral ionization structures in the E region. In most cases the vector velocity derived from BARS observations had a magnitude substantially below that inferred from the scintillation measurements. Observations during one period were noticeably different from the others, with unusually small Doppler velocities.

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