A new method for locating thunderstorms and counting their lightning discharges from a single observing station

Heydt, G.; Volland, H.

doi:10.1016/0021-9169(64)90165-5

Cited by 11 publications

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“…Atmospherics activity in the lower VLF range (5-9 KHz) has been observed in Argentina since 1971. The observation station at the Observatorio Nacional de Fisica Cosmica (ONFC) in San Miguel near Buenos Aires is presently equipped with a receiving/recording system developed at the Heinrich-Hertz-lnstitut (HHI) in Berlin [Heydt and Volland, 1964;Heydt, 1966]. This system is capable of automatic recording of direction, intensity, and time of occurrence of atmospherics activity.…”

Section: Introductionmentioning

confidence: 99%

Atmospherics measurements in San Miguel, Argentina

Harth¹,

Hofmann²,

Falcoz³

et al. 1978

J. Geophys. Res.

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Measurements of VLF atmospherics taken atSan Miguel, Argentina, are presented. Results from one 13-year measurement period (1956-1969) as well as one 2-year interval (1971-1973) are used to document the morphology of the diurnal and annual variations in atmospherics activity at San Miguel. The atmospherics rates obtained during the second interval, which may be ordered according to arrival azimuth, show that most of the activity originates in thunderstorm cells located NE and NW of the observation station. Distance determinations from the dispersion of the atmospherics impulses, together with an estimate of the instrument's range, indicate that these activity cells lie primarily over the South American continent. Additional measurements of atmospherics activity taken in Berlin from 1971 to 1975 are also shown, from which a certain trend in the activity in the South American sector may be inferred. Both the Berlin and San Miguel records indicate a decline in atmospherics activity over the measurement period.

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Section: Introductionmentioning

confidence: 99%

Atmospherics measurements in San Miguel, Argentina

Harth¹,

Hofmann²,

Falcoz³

et al. 1978

J. Geophys. Res.

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Observations on the Propagation Constant of the EarthIonosphere Waveguide in the Frequency Band 8 c/s to 16 kc/s

Chapman¹,

Jones²,

Todd³

et al. 1966

Radio Science

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Recent observations at King's College, London, concerning the determination of the propagation constant (attenuation and phase velocity) of electromagnetic waves over the earth's surface are described. The experimental techniques employed include the use of single‐station and two‐station magnetic recording of atmQspherics (sferics) propagated over great distances and the observation of the frequencies and Q factors of Schumann resonances. The experimental results are interpreted in terms of the waveguide mode theory of propagation by assuming various electron and heavy ion density profiles for the ionosphere. The present work agrees well with the observations of other workers made over a limited frequency range, and enables the propagation constant to be determined from 8 c/s to 16 kc/s.

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The Propagation of Atmospherics

Harth

1976

Electrical Processes in Atmospheres

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Fundamental problems in atmospherics research are sketched. Breaking the subject down into three natural divisions: sources, propagation medium, and receiving technology, it is shown that, as a rule, only a statistical analysis of the received impulses leads to interpretable and significant results, and that the propagation conditions in the terrestrial wave guide (Earth-Ionosphere) must be taken into account. These propagation conditions also essentially determine the selection of the parameters to be measured from the atmospherics spectrum. Some of these parameters are discussed. The changing propagation conditions of the terrestrial wave guide are presented with the help of measurements of these parameters. With a knowledge of these propagation conditions on the received parameters one can determine the mean location and thus the global distribution of the atmospherics sources. Furthermore, these localizations of storm centers can serve in the future to better determine the intensity of the individual atmospherics sources. A newly developed method of attack is applied for the purpose of ascribing small scale and large scale dynamics to the various atmospherics sources. A few brief remarks on the observation of global atmospherics activity are offered in order to point out that this project is not so much a scientific problem as it is one of logistics. H. Dolezalek et al. (eds.), Electrical Processes in Atmospheres

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A new method for locating thunderstorms and counting their lightning discharges from a single observing station

Cited by 11 publications

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Atmospherics measurements in San Miguel, Argentina

Atmospherics measurements in San Miguel, Argentina

Observations on the Propagation Constant of the EarthIonosphere Waveguide in the Frequency Band 8 c/s to 16 kc/s

The Propagation of Atmospherics

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