Abnormal Polarization of the Atmospheric Pulses reflected successively from the Ionosphere

Article metrics


WHILE engaged in the determination of the direction of arrival of atmospherics by the conventional cathode-ray tube direction-finder, it was observed that, on occasions, for atmospherics of comparatively distant origin, there were elliptic patterns of gradually decreasing eccentricity and tilt-angle along with one or more linear responses, although when tested with the audio-frequency oscillations from a signal generator fed into the aerial system of the cathode-ray tube direction-finder, the fluorescent screen exhibited only the usual linear responses. It appears certain that these elliptic patterns are evidences of abnormal polarization of the atmospheric pulses reflected successively from the ionosphere, the linear responses being due to the direct (or ground-wave) atmospheric pulses. More than forty oscillograms showing the elliptic patterns and lines were recorded during the monsoon months of 1955. Usually the tilt-angle of the ellipses was found to decrease with the increasing order of ionospheric reflexion. A reversal in the direction of precession was noticed in few cases.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Tantry, B. A. P., J. Sci. Indust. Res., B, 11, 218 (1952).

  2. 2

    Shipley, J. F., Distrib. Elect., 12, 413 (1940).

  3. 3

    Adcock, F., and Clarke, C., J. Inst. Elect. Eng., Part 3, 94, 113 (1947).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

KHASTGIR, S. Abnormal Polarization of the Atmospheric Pulses reflected successively from the Ionosphere. Nature 181, 404–405 (1958) doi:10.1038/181404b0

Download citation

Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.