Abstract
ABNORMAL ionospheric absorption of cosmic radio noise has been investigated at Moscow (46° 44′ N., 117° 00′ W.), Idaho, U.S.A., since September 1962. Observations are being made by three riometers operating at the frequencies of 20, 30 and 40.25 Mc/s.
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KIM, J., KLEINKOPF, J. Heights of Central Absorbing Regions for a Strong Auroral Absorption Event at Lower Latitude. Nature 203, 1160–1161 (1964). https://doi.org/10.1038/2031160b0
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DOI: https://doi.org/10.1038/2031160b0
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