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NAUKA I TEKHNOLOGICHESKIE RAZRABOTKI (SCIENCE AND TECHNOLOGICAL DEVELOPMENTS), ISSN: 2079-5165, eISSN: 2410-7948, DOI: 10.21455/std; https://elibrary.ru/title_about.asp?id=32295; http://std.ifz.ru/. The journal was founded in 1992.

REGISTRATION AND MODELING OF ULF-ELF SIGNALS
AT STARAYA PUSTYN STATION
DURING THE FENICS-2019 EXPERIMENT

A.V. Ryabov¹, V.A. Pilipenko², E.N. Ermakova³, N.G. Mazur⁴,

E.N. Fedorov⁴, A.A. Zhamaletdinov⁵, A.N. Shevtsov⁶

¹ Institute of Applied Physics, Nizhny Novgorod, Russia

² Space Research Institute, Russian Academy of Sciences, Moscow, Russia

³ Research Radiophysical Institute, Lobachevsky Nizhny Novgorod University, Nizhny Novgorod, Russia

⁴ Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

⁵ St. Petersburg Branch of Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation
of the Russian Academy of Sciences (IZMIRAN), St. Petersburg, Russia

⁶ Geological Institute, Kola Science Center, Russian Academy of Sciences, Apatity, Russia

Corresponding author: V.A. Pilipenko, e-mail: pilipenko_va@mail.ru

Highlights

– Registration of the magnetic components of the field of industrial power transmission lines at a distance of 1610 km from the source within the framework of the FENICS-2019 experiment

– Theoretical calculations of the propagation of the electromagnetic field were performed taking into account the influence of the ionosphere for two source models – (a) in the dipole approximation and (b) in the form of a linear surface current of infinite length

– Studies of the dependence of the amplitude of the received signal on frequency were carried out, taking into account the influence of the ionosphere

– A conclusion was made about the prospects of using industrial power lines for deep magnetotelluric sounding

Abstract. In September 2019, on the Kola Peninsula, an experiment was carried out to generate ULF–ELF signals at night using two decommissioned industrial power lines as a horizontal emitting antenna. The line current was supplied from an external 200 kW generator. The current strength varied from 240 A at low frequencies (0.382 Hz) to 20 A at the highest (194 Hz). The paper presents the results of recording ULF signals at the Staraya Pustyn magnetic station, which is 1610 km away from the transmission line. Signals with frequencies from 0.6 Hz to 6.4 Hz were recorded. The signal amplitudes, normalized to the emitter current, varied in the range of 0.4–0.7 fT/A. For theoretical estimates, two models were used: 1) formulas from the theory of ELF field excitation in the Earth–ionosphere waveguide and 2) a numerical model of the ULF field in the atmosphere and ionosphere created by a linear surface current of infinite length. The numerical model is based on the calculation of the Maxwell system of equations in a vertically inhomogeneous atmosphere and ionosphere, the parameters of which are calculated using the IRI model. A fundamental feature of model 2 is that it takes into account the contribution of the ionospheric waveguide propagation to the excited field at large distances at frequencies above the critical waveguide frequency ~0.5 Hz. The dependence of the amplitude of the recorded signals of an artificial source on the frequency in the range of 2–8 Hz has a non-monotonic character, which may be a manifestation of the effects of waveguide propagation along the ionosphere.

Keywords: controlled source, electromagnetic field, ionosphere, waveguide propagation

Cite this article as: Ryabov A.V., Pilipenko V.A., Ermakova E.N., Mazur N.G., Fedorov E.N., Zhamaletdinov A.A., Shevtsov A.N. Registration and modeling of ULF-ELF signals at the Staraya Pustyn station during the FENICS-2019 experiment, Nauka i Tekhnologicheskie razrabotki (Science and Technological Developments). 2020, vol. 99, no. 2, pp. 18–37. [in Russian]. https://doi.org/10.21455/std2020.2-2

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About the authors

RYABOV Alexander Viktorovich –Institute of Applied Physics, Russian Academy of Sciences. Russia, 603950, Nizhny Novgorod, Ul’janova 46. E-mail: alexr@nirfi.unn.ru

PILIPENKO Vyacheslav Anatolyevitch – Space Research Institute, Russian Academy of Sciences. Russia, 117997, Moscow, Profsoyuznaya 84/32. E-mail: pilipenko_va@mail.ru

ERMAKOVA Elena Nikolaevna – Radiophysics Research Institute of Lobachevsky Nizhny Novgorod University. Russia, 603950, Nizniy Novgorod, Bolshaya Pecherskaya 25/12a. E-mail: l.ermakova@nirfi.unn.ru

МАZUR Nikolay Grigorievich – Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya 10. E-mail: ngmazur@mail.ru

FEDOROV Evgeny Nikolaevich – Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya 10. E-mail: enfedorov1@yandex.ru

ZHAMALETDINOV Abdulkhai Azymovich – St. Petersburg Branch of Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation Russian Academy of Sciences. Russia, 199034, St. Petersburg, Universitetskaya nab., 5, lit. B. E-mail: abd.zham@mail.ru

SHEVTSOV Alexander Nikolaevich – Geological Institute FRC “Kola Science Center of the Russian Academy of Sciences”. Russia, 184209, Apatity, Murmansk region, Fersman 14. E-mail: anshev2019-01@mail.ru