On the theory of whistler precursors on a VLF transmitter signal

Details On the theory of whistler precursors on a VLF transmitter signal On the theory of whistler precursors on a VLF transmitter signal

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jatp...52..797c&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 52, Sept. 1990, p. 797-800.

Physics

Coherent Radiation, Space Plasmas, Vlf Emission Recorders, Wave Propagation, Whistlers, Backscattering, Plasma Density, Transhorizon Radio Propagation

Scientific paper

A new type of whistler precursor found on a signal from the Siple VLF transmitter is explained in terms of spectral-choosing backscattering of whistlers by periodic plasma density striations created by counterpropagating transmitter signals in the magnetosphere. At signal amplitudes of 2 mV/m the density modulation is shown to be equal to 0.04 percent, corresponding to a coefficient of whistler backscattering, R = 0.25. The same mechanism can be used to explain 'postcursor' occurrence, assuming that backscattering takes place also for a whistler reflected from the ionosphere during the second pass through the interactionn region.

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