What question did this study set out to answer?

To investigate the origin and physical characteristics of whistling atmospherics occurring below 15 kc/s and develop a theoretical model describing their propagation and dispersion through the ionosphere.

July 9, 1953Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences

An investigation of whistling atmospherics

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To investigate the origin and physical characteristics of whistling atmospherics occurring below 15 kc/s and develop a theoretical model describing their propagation and dispersion through the ionosphere.
Recorded and analyzed low-frequency radio whistlers to measure frequency variation over time, diurnal patterns, and annual variations.
Correlated whistler events with impulsive atmospherics generated by lightning strokes occurring within approximately 2,000 km.
Modeled wave propagation along Earth's geomagnetic lines of force across the equator to estimate outer ionospheric electron density and atmospheric temperature.
Demonstrated that whistlers originate from impulsive lightning discharges and travel along geomagnetic lines of force across the equator, with reflections from Earth's surface creating echoes of increased dispersion.
Observed that magnetic field lines provide a focusing effect that prevents excessive wave energy loss during transit through the outer ionosphere.
Determined that the measured wave dispersion requires an unexpectedly high electron density in the outer ionosphere, implying either terrestrial atmospheric temperatures of at least 7,200° K or an influx of extraterrestrial electrons.

Authors

LSL. R. O. StoreyAnglia Ruskin University

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Implication

Observational and theoretical study demonstrates that lightning-induced radio waves propagate along geomagnetic field lines, indicating unexpectedly high electron densities in the outer ionosphere.

Cite This Study

L. R. O. Storey (1953) studied this question.

synapsesocial.com/papers/6a15c6a1d64fa33389a00c7d https://doi.org/10.1098/rsta.1953.0011

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Implication

Observational and theoretical study demonstrates that lightning-induced radio waves propagate along geomagnetic field lines, indicating unexpectedly high electron densities in the outer ionosphere.

An investigation of whistling atmospherics

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Discussion

Implication

Cite This Study

An investigation of whistling atmospherics

Key Points

Discussion

Implication

Cite This Study