Abstract
The results of investigations into the occurrence of extremely low-frequency (ELF) modulation in high-frequency (HF) signals are presented. The seasonal and diurnal behavior of the occurrence of synchronous multichannel (SM) ELF modulation is established. A correlation between the SM ELF modulation occurrence and the presence of sporadic E-layers in the ionosphere is found.
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Kolesnik, A.G., Kolesnik, S.A., Kolmakov, A.A. et al. Investigation of the Occurrence of ELF Modulation in HF Signals from the Data of Electromagnetic Monitoring. Russian Physics Journal 44, 77–81 (2001). https://doi.org/10.1023/A:1011317003890
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DOI: https://doi.org/10.1023/A:1011317003890