Simultaneous observations of E and F region electric field fluctuations at the magnetic equator

Details Simultaneous observations of E and F region electric field fluctuations at the magnetic equator Simultaneous observations of E and F region electric field fluctuations at the magnetic equator

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55..185v&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 2, p. 185-192.

Physics

2

Diurnal Variations, E Region, Electric Field Strength, Equatorial Electrojet, F Region, Magnetic Equator, Plasma Drift, Doppler Radar, Gravity Waves, Spectrum Analysis, Statistical Analysis

Scientific paper

Results are presented of simultaneous daytime observations of E region horizontal irregularity drift velocities in the equatorial electrojet and Fe region vertical plasma drifts made on a few magnetically quiet days at the magnetic equatorial station of Trivandrum. Measurements of electrojet irregularity velocities by VHF backscatter radar and the F region vertical plasma drifts by HF Doppler radar are used to deduce the daytime East-West electric fields in the E and F regions, respectively. The E and F region electric field fluctuations are found to be well correlated; the estimated correlation coefficient is in the range of 0.52-0.8. The spectral analysis reveals dominant components in the range of 30-90 min with F region components stronger than those of the E region by a factor of about 1.5 on the average. The spectral characteristics are such that the commonly occurring medium-scale gravity waves could possibly be the source of the observed fluctuations in the E and F region electric fields.

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