The screening of micropulsation signals by the atmosphere and ionosphere

Details The screening of micropulsation signals by the atmosphere and ionosphere The screening of micropulsation signals by the atmosphere and ionosphere

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.3234h&link_type=abstract

Journal of Geophysical Research, vol. 81, July 1, 1976, p. 3234-3240.

Physics

77

Atmospheric Attenuation, Geomagnetic Micropulsations, Ionospheric Propagation, Screen Effect, Atmospheric Models, Crossed Fields, Earth Magnetosphere, Electric Fields, Field Strength, Ionospheric Conductivity, Magnetic Field Configurations, Night Sky, Spatial Distribution

Scientific paper

A study is made of the screening effect of the atmosphere and ionosphere which lets only part of a micropulsation signal reach the ground. Using four ionospheric models, we find that the previously predicted polarization rotation by the ionosphere occurs under all conditions but that at night the ionosphere reflects much less of the incident energy, i.e., that it becomes a much better energy sink. We also find that the ionosphere-atmosphere system strongly attenuates signals with large cross-field wave numbers (greater than 0.02 per km). This results in the observation of only the gross structure of magnetospheric wave fields on the ground.

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