Abstract
THE highly localized character of multiple whistler signals suggests strongly (though indirectly) that columns of field aligned ionization must exist1–4. In addition, simple ray tracing calculations show quite clearly that without these hypothetical columns a rapid dispersion in latitude would be observed following successive reflexions at conjugate magnetic field regions5. There is some direct experimental evidence6 for the existence of these columns; but by and large, only column fragments seem to have been observed. Indeed, recent top-side probe measurements show no evidence for continuous columns7.
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LIPPMANN, B., WYATT, P. & ERMA, V. Evidence of Whistler Guidance by Magneto-ionic Ducts of Poorly-defined Structure. Nature 204, 1182–1183 (1964). https://doi.org/10.1038/2041182a0
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DOI: https://doi.org/10.1038/2041182a0
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