Recording and Modeling of Ulf–Elf Signals at the Staraya Pustyn Station During the Fenics-2019 Experiment

Ryabov, A.V.; Pilipenko, V.A.; Ermakova, E.N.; Mazur, N.G.; Fedorov, E.N.; Zhamaletdinov, A.A.; Shevtsov, A.N.

Авторы: Ryabov A.V., Pilipenko V.A., Ermakova E.N., Mazur N.G., Fedorov E.N., Zhamaletdinov A.A., Shevtsov A.N.
Журнал: Seismic Instruments
Том: 57
Номер: 3
Год издания: 2021
Первая страница: 329
Последняя страница: 342
Оригинальные версии: Регистрация и моделирование УНЧ-СНЧ сигналов на станции Старая Пустынь во время экспе-римента FENICS-2019
DOI: 10.3103/s0747923921030129
Аннотация: In September 2019, on the Kola Peninsula, an experiment was carried out to generate ULF–ELFsignals at night using two decommissioned industrial power lines as a horizontal emitting antenna. The linecurrent was supplied from an external 200 kW generator. The current strength varied from 240 A at low fre-quencies (0.382 Hz) to 20 A at the highest (194 Hz). The paper presents the results of recording ULF signalsat the Staraya Pustyn magnetic station, which is 1610 km from the power line. Signals with frequencies from0.6 to 6.4 Hz were recorded. The signal amplitudes, normalized to the emitter current, varied in the range of0.4–0.7 fT/A. For theoretical estimates, two models were used: (1) formulas from the theory of ELF fieldexcitation in the Earth–ionosphere waveguide and (2) a numerical model of the ULF field in the atmosphereand ionosphere created by a linear surface current of infinite length. The numerical model is based on calcu-lation of the system of Maxwell equations in a vertically inhomogeneous atmosphere and ionosphere, theparameters of which are calculated using the IRI model. A fundamental feature of model 2 is that it takes intoaccount the contribution of the ionospheric waveguide propagation to the excited field at large distances atfrequencies above the critical waveguide frequency of ~0.5 Hz. The dependence of the amplitude of therecorded signals from an artificial source on a frequency of 2–8 Hz has a nonmonotonic character, whichmay be a manifestation of the effects of waveguide propagation along the ionosphere. (16) (PDF) Recording and Modeling of Ulf–Elf Signals at the Staraya Pustyn Station During the Fenics-2019 Experiment. Available from: https://www.researchgate.net/publication/351844644_Recording_and_Modeling_of_Ulf-Elf_Signals_at_the_Staraya_Pustyn_Station_During_the_Fenics-2019_Experiment#fullTextFileContent [accessed May 31 2021].
Добавил в систему: Федоров Евгений Николаевич

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Recording and Modeling of Ulf–Elf Signals at the Staraya Pustyn Station During the Fenics-2019 Experimentстатья

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