Computer Science – Sound
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981cajph..59.1089f&link_type=abstract
Canadian Journal of Physics, vol. 59, Aug. 1981, p. 1089-1096. Natural Sciences and Engineering Research Council
Computer Science
Sound
4
Auroras, Electron Precipitation, Ionospheric Electron Density, Luminosity, Satellite Sounding, Spatial Distribution, Atmospheric Ionization, Atmospheric Models, Canada, Magnetohydrodynamic Stability
Scientific paper
The ionospheric electron content measured at La Ronge, Saskatchewan for a variety of auroral conditions during the Pulsating Aurora Campaign in February 1980 is discussed. It is noted that the two-frequency differential phase technique was used with the NNSS satellite beacons. Comparisons of optical data and the radio results suggest that for quite strong pulsations the electron content is modulated by less than 2%. Even this small change is slightly larger than the purely temporal variations to be expected on the basis of currently accepted relaxation times in the ionosphere. If the observed fluctuations are interpreted as representing both temporal and spatial variations, good agreement is obtained using model calculations. It is noted that for irregularity sizes and strengths to which the experiment is sensitive, structure was present in diffuse or patchy aurora but absent from at least some well-defined forms. This is seen as suggesting that the technique can be used to explore the mechanism of formation of the irregularities.
Forsyth P. A.
Fulford J. A.
Hofstee J.
Lyon G. F.
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