Abstract
AT stations in high latitudes, the absence of ionospheric echoes at vertical incidence (“blackout”) is usually attributed to increased ionization in the D region causing strong absorption of radio waves and is usually associated with a disturbed magnetic field.
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References
Bellchambers, W. H., and Piggott, W. R., Proc. Roy. Soc., A, 256, 200 (1960).
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SCHAEFFER, R. Ionospheric No-echo Occurrences. Nature 214, 376 (1967). https://doi.org/10.1038/214376a0
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DOI: https://doi.org/10.1038/214376a0
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Ionospheric No-echo Occurrences
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