Solar eclipse effects on HF and VLF propagation

Details Solar eclipse effects on HF and VLF propagation Solar eclipse effects on HF and VLF propagation

May 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38..495m&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 38, May 1976, p. 495-502.

Computer Science

Sound

Electric Fields, Geomagnetism, Radio Transmission, Solar Eclipses, Atmospheric Electricity, High Frequencies, Rocket Sounding, Very Low Frequencies

Scientific paper

A multifrequency oblique-incidence experiment performed during the 10 July 1972 total solar eclipse is described. A definite correlation of VLF phase, HF signal strength, and geomagnetic field behavior on eclipse day is demonstrated. Because of the relatively high transmitter powers available, ionospheric nonlinearities observed during the eclipse period provided additional diagnostic information on oblique-incidence phenomena which are particularly sensitive to nonzero divergence of the electric field vector along the propagation path. Turbulence is suggested as a major suppressant of charge-coupled effects in the lower ionosphere. If the observed eclipse behavior is interpreted entirely in terms of atmospheric irregularities, severe but realistic constraints on mid-eclipse conditions are implied. At mid-eclipse a nearly impulsive perturbation presumably caused by a re-entering rocket was also noted.

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