Abstract
THE low-frequency (c. 100–500 c./s.) or ‘slow tail’ component in the wave-form of an atmospheric was first studied in detail by Watson-Watt, Herd and Lutkin1. They denned two parameters: the delay t as the time elapsing between the start of the main oscillatory section of the atmospheric and the commencement of the slow tail, and the quarter-period τ/4 as the time occupied by the first quarter-cycle of the tail. Both t and τ/4 were found to increase in a somewhat irregular, non-linear, manner, as the distance of origin, D, of the atmospheric increased.
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References
Watson-Watt, R. A., Herd, J. F., and Lutkin, F. E., Proc. Roy. Soc., A, 162, 267 (1937).
Ockenden, C. V., Met. Mag., 76, 78 (1947).
Budden, K. G., Phil. Mag., 42, 1 (1951).
Hales, A. L., Proc. Roy. Soc., A, 193, 60 (1948).
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HEPBURN, F., PIERCE, E. Atmospherics with Very Low-frequency Components. Nature 171, 837–838 (1953). https://doi.org/10.1038/171837b0
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DOI: https://doi.org/10.1038/171837b0
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