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Birch, Martin John, Hargreaves, J.K. and Bromage, Barbara Janice Isabel (2013) Properties of auroral radio absorption patches observed in the morning sector using imaging riometer and incoherent-scatter radar. Journal of Atmospheric and Solar-Terrestrial Physics, 105 (-). pp. 262-272. ISSN 1364-6826
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Official URL: http://dx.doi.org/10.1016/j.jastp.2012.12.004
Abstract
The investigation concerns the size and motion of spatial fine structure in auroral radio absorption as observed by imaging riometer. Electron density profiles in the D and E regions determined by simultaneous incoherent-scatter radar were inverted to provide an estimate of the energy spectrum of the incoming electrons, and it is shown that the gradient-curvature drift at these energies is not consistent with the observed motion of the absorption fine structure, being too large by a factor of 5 or 6. However, a comparison with F-region drifts determined by the SuperDARN radar network supports a hypothesis that the cause lies in moving structures within the magnetosphere.
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