Publicado 12 números por año
ISSN Imprimir: 0040-2508
ISSN En Línea: 1943-6009
Indexed in
Impact of the Ionosphere Day-Night Non-Uniformity on Amplitude of ELF Radio Signal
SINOPSIS
Diurnal amplitude variations are presented of the man-made ELF radio signal recorded at the Bellinshausen Antarctic station. The propagation path was 16 Mm long. Average level of the field corresponds to the literature data. Diurnal amplitude variations arise from the day-night asymmetry of the Earth-ionosphere waveguide. The ambient day level is by 5 − 6 dB lower than that of nocturnal conditions (vertical electric field), and it is by 4 − 5 dB lower in the horizontal magnetic field. Model fields were computed in the uniform spherical Earth − ionosphere cavity with the 'whole day' or 'whole night' ionospheres. It is shown that numerical data based on the literature propagation model contradict the observations. Discrepancy arises from inexact phase velocity of the ELF radio wave: the latter governs the position of interference maxima and minima. Model data match the experiment after phase velocity is corrected by ∼10%. Since the 'whole day' and the 'whole night' ionosphere models do not account for the wave diffraction at the day − night interface, an extended modeling is desirable.
-
Yano M., Ida Y., Hobara Y., Hayakawa M., Nickolaenko A. P., Reception of ELF transmitter signals at Moshiri, Japan, and their propagation characteristics, Radio Science, 45, 1, 2010. Crossref
-
Galuk Yu P., Nickolaenko A.P., Hayakawa M., Amplitude variations of ELF radio waves in the Earth–ionosphere cavity with the day–night non-uniformity, Journal of Atmospheric and Solar-Terrestrial Physics, 169, 2018. Crossref
-
Shvets Alexander V., Nickolaenko Alexander P., Koloskov Alexander V., Yampolsky Yuri M., Budanov Oleg V., Shvets Alisa A., Day after day variations of arrival angles and polarisation parameters of Q bursts recorded at Antarctic station “Akademik Vernadsky”, Journal of Atmospheric and Solar-Terrestrial Physics, 229, 2022. Crossref