Lunar and solar daily variations of ionospheric electron content at Delhi

Details Lunar and solar daily variations of ionospheric electron content at Delhi Lunar and solar daily variations of ionospheric electron content at Delhi

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jatp...48..301b&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 48, March 1986, p. 301-310.

Physics

Diurnal Variations, Ionospheric Electron Density, Lunar Tides, Solar Cycles, Solar Terrestrial Interactions, Annual Variations, India, Solar Activity Effects

Scientific paper

Ionospheric electron content measurements obtained at Delhi during the period 1975-1980 have been analysed by the Chapman-Miller method to compute lunar and solar daily variations. The results show that the magnitude of the lunar harmonic components is about one-tenth that of the solar harmonic components. Significant seasonal and solar cycle variations were observed for both the lunar and the solar terms. The lunar semi-diurnal component, the most significant term, can be explained as due to the additional 'fountain' effect caused by the lunar semi-diurnal variation of the electric field at the equatorial region. The lunar semi-diurnal variations were found to have significant oceanic and ionospheric components.

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