THE EFFECT OF ABSORPTION AND MULTIPLE SCATTERING ON RADIO-AURORAL OBSERVATIONS

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Abstract
The apparently anomalous amplitude-frequency dependence sometimes observed during radio-auroral experiments is accounted for on the basis of absorption, or multiple scattering, or both. Auroral-type absorption as high as 25 db at 42 Mc/s is observed. Multiple scattering possibly up to fifth order at 104 Mc/s is also observed. On occasion both absorption and multiple scattering are operative simultaneously. Assessing the magnitude of these effects is important in separating amplitude-frequency dependence from radio-auroral data.

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