Schumann resonances observed with a balloon in the stratosphere

Details Schumann resonances observed with a balloon in the stratosphere Schumann resonances observed with a balloon in the stratosphere

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jatp...41..135o&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 41, Feb. 1979, p. 135-142. Research supported by the Ito Science Foundatio

Computer Science

Sound

8

Atmospheric Electricity, Balloon Sounding, Electric Fields, Electromagnetic Noise, Extremely Low Radio Frequencies, Ionospheric Propagation, Lightning, Stratosphere, Meteorological Charts, Noise Measurement, Resonant Frequencies, Signal To Noise Ratios, Thunderstorms

Scientific paper

The electric vertical component of natural ELF noise has been measured with a balloon at two different altitudes, 20 and 26 km in the stratosphere for about 1 day on 3-4 October 1977 over the Pacific Ocean. Observations of high S/N-ratio Schumann resonances were detected up to the 7th mode (44.9 Hz) but no higher mode could be observed. Line splitting was observed around the peak frequencies in the power spectra averaged for 1 h. Observed resonance peak frequencies were the same at the two altitudes but peak power was about 20% lower at 26 km than at 20 km only for the second mode. A comparison with the earlier ground observations is made.

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