Physics – Space Physics
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ijrsp..11..129a&link_type=abstract
Indian Journal of Radio and Space Physics (ISSN 0367-8393), vol. 11, Aug. 1982, p. 129-132. Research supported by the Council of
Physics
Space Physics
1
Equatorial Electrojet, Geomagnetism, Annual Variations, Fast Fourier Transformations, India, Solar Cycles, Spectrum Analysis
Scientific paper
Using the indices of the equatorial electrojet and the counter-electrojet in the Indian region, 20-yr long time series are formed and are subjected to spectral analysis by the fast Fourier transform technique. The 11-yr solar cycle line is prominently seen followed by the semi-annual line in the electrojet spectrum and the annual line in the counter-electrojet spectrum. The assumption, regarding the complete removal of disturbance field of extra-ionospheric origin in the electrojet field, in deriving the indices is supported by the absence of the 27-day and 13.5-day lines. The line corresponding to the lunar semi-monthly tide is found to be significant in both the spectra.
Arora Baldev R.
Bhargava B. N.
Sastri N. S.
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