SHIFT OF ANTIPODE MAXIMUM OF ELECTRIC FIELD IN THE RESONATOR THE EARTH–IONOSPHERE CAVITY CAUSED BY DAY–NIGHT NON-UNIFORMITY

• Main Authors: Yu. P. Galyuk, A. P. Nikolaenko, M. Hayakawa
• Format: Article
• Language: English
• Published: Akademperiodyka 2017-06-01
• Series: Радиофизика и электроника
• Subjects: schumann resonance; spatial distribution of field nearby the source antipode in the spherical cavity; vertical profile of atmosphere conductivity
• Online Access: http://re-journal.org.ua/sites/default/files/file_attach/2017-2/7.pdf
• ISSN: 1028-821X; 2415-3400

Accounting for the actual structure of the lower ionosphere in the problems of global electromagnetic (Schumann) resonance is an important and urgent task. The paper analyzes an impact of deviations in the vertical profile of the atmosphere conductivity at the night and the day sides of the planet on the spatial distribution of electromagnetic field in the Schumann resonance band. The cavity characteristics depend on the conductivity profiles and are accounted for at the day and the night sides by using the full wave solution method. The problem in non-uniform cavity is solved with the help of 2D telegraph equation. The shift of the maximum amplitude of the electric field component from the source geometric antipode is demonstrated at several frequencies for different locations of the source, and in the models of smooth and sharp day–night transition. We demonstrate that the day-night non-uniformity is able to shift the antipode maximum of the vertical electric field from the source geometric antipode of the center towards the center of the day hemisphere by a distance reaching 300 km.