Abstract
RADIO echoes on a frequency of 46 Mc./s. have been reported by Lovell, Clegg and Ellyett1. They have been observed also on a frequency of 32.7 Mc./s. by McKinley and Millman2, incidental to their studies of meteor ionization. More recently, a systematic search for such echoes has been made at Saskatoon, Canada, using radar equipment having frequencies of 3,000 Mc./s. and 106.5 Mc./s. During this search, echoes have been observed regularly on the lower frequency but not at all on the higher one.
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References
Lovell, Clegg and Ellyett, Nature, 160, 372 (1947).
McKinley and Millman (private communication).
Petrie, Forsyth and McConechy, Nature, 163, 774 (1949).
Forsyth, Petrie and Currie, Nature, 164, 453 (1949).
Herlofsen, Nature, 160, 867 (1947).
Appleton and Builder, Proc. Phys. Soc., 45, 208 (1933).
Tonks and Langmuir, Phys. Rev., 33, 195 (1929).
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FORSYTH, P., PETRIE, W., VAWTER, F. et al. Radar Reflexions from Auroras. Nature 165, 561–562 (1950). https://doi.org/10.1038/165561b0
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DOI: https://doi.org/10.1038/165561b0
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