Investigation of Manmade and Natural Perturbations of the Earth's Electric Field
GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION
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The report describes an investigation of the effect of low frequency periodic perturbations of the height of a conducting surface on the earths local electric field. Simulation of small, low audio frequency vibrations of a portion of a conducting surface indicate that such displacement will result in perturbations to the normal component of the electric field above that surface. The exact magnitude of these perturbations is a function of the type of probe used to sense the perturbations and the probe-to-surface distance and is, in general, on the order of microvolts. Atmospheric noise spectra were obtained by use of a passive antenna measurement scheme. The data obtained were analyzed using the Fast Fourier Transform and noise spectra on the band 0.1 to 100 Hertz were acquired. The noise spectra thus obtained indicate that atmospheric noise appears to fall off at the rate of 27 dB per decade in the region 0.1 to 100 Hertz.
- Atmospheric Physics