Abstract
RIIHMAA has reported night-time reception of a solar radio event1. The observation, in the frequency range 20.85–23.20 MHz, was made at Kiiminki (65°05′N, 25°54′E) on 30 March 1976 with the Sun (and Jupiter) well below the horizon. Night-time reception of solar bursts had also been reported by Smith et al.2. Such night-time solar radio burst reception might be brought about by anomalous propagation associated with plasma waves in the lower ionospheric E layer. I briefly discuss this phenomenon here and point out the possible importance of large ionospheric electric fields.
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References
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D'ANGELO, N. Night-time reception of solar radio events. Nature 267, 412 (1977). https://doi.org/10.1038/267412a0
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DOI: https://doi.org/10.1038/267412a0
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