Computer Science – Sound
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.3573c&link_type=abstract
Journal of Geophysical Research, vol. 82, Sept. 1, 1977, p. 3573-3576.
Computer Science
Sound
Auroral Arcs, Bow Waves, Infrasonic Frequencies, Sound Waves, Traveling Ionospheric Disturbances, Ionospheric Currents, Pressure Distribution, Signature Analysis
Scientific paper
The infrasonic bow wave from a traveling auroral arc of finite length is calculated, and the results of the infinite length approximation are essentially recovered. The finite length results in a distinct, separate, second trailing pulse that is weaker than, and of the opposite sign from, the main pressure wave. It is shown that the sign-reversed signatures sometimes observed may be due to arc currents that have strongly defined trailing ends and relatively diffuse frontal structures.
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