Letter | Published:

Polarisation of Echoes from the Heaviside Layer

Nature volume 130, pages 398399 (10 September 1932) | Download Citation

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Abstract

ONE of the most fruitful methods of investigating the Heaviside layer is that originated by Breit and Tuve, in which a series of short impulses of the order of 0.2 of a millisecond in duration are transmitted and the direct ray and echoes reflected at nearly normal incidence are observed at a neighbouring station. The echo patterns observed are often very complex and it has been found that a single F layer echo, say, is often split into two fairly closely spaced components. This has been attributed by Appleton to the double refraction suffered by a ray in passing through the ionised regions of the upper layer.

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  1. Research Laboratories, Marconi Works, Chelmsford, July 18.

    • T. L. ECKERSLEY

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DOI

https://doi.org/10.1038/130398b0

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