Abstract
ON March 30, 1976, at 2104–2106 UT, anomalous high-level radio bursts were recorded with a 48-channel polarised high resolution radio spectrograph1 operating at a frequency range of 20.85–23.20 MHz. The observation was made at Kiiminki (65°05′N, 25°54′E), in the complete absence of interference of any kind and with the Sun and Jupiter well below the horizon. The antenna (two crossed log-periodic units in parallel) was directed towards North and elevated 30° for the purpose of recording scintillation spectra of the radio source Cassiopeia A. The spectrograph is designed primarily for observations of Jupiter2 and its sensitivity for recording Cassiopeia A is marginal.
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Riihimaa, J. J., Aarne Karjalainen Observatory, Report No.23 (1975).
Riihimaa, J. J., Nature, 255, 210–211 (1975).
Smith, A. G., Carr, T. D., and Perkins, W. H., Nature, 183, 597–598 (1959).
The Finnish Academy of Science and Letters, Sodankylä Ionospheric Data and Geomagnetic Indices, March 1976.
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RIIHIMAA, J. Night-time reception of a solar radio event. Nature 263, 397 (1976). https://doi.org/10.1038/263397a0
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DOI: https://doi.org/10.1038/263397a0
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