Equatorial spread F and sporadic E-layer connections during the Brazilian Conjugate Point Equatorial Experiment (COPEX)

Details Equatorial spread F and sporadic E-layer connections during the Brazilian Conjugate Point Equatorial Experiment (COPEX) Equatorial spread F and sporadic E-layer connections during the Brazilian Conjugate Point Equatorial Experiment (COPEX)

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jastp..70.1133b&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, vol. 70, issue 8-9, pp. 1133-1143

Physics

7

Equatorial Ionosphere, Ionospheric Irregularities, Electric Fields And Currents, Sporadic E Layer

Scientific paper

The Conjugate Point Equatorial Experiment (COPEX) was conducted in Brazil from October to December 2002. The observational instruments were placed at three sites nearly along a magnetic meridian, one at the magnetic equator and the other two at magnetically conjugate points. We analyzed the spread F (SF) occurrence and sporadic E (Es) layer characteristics in the simultaneous data to look for any possible relation between these two phenomena. The present study does not detect any significant correlation between the SF occurrence/generation at the magnetic equator and the presence of Es layers at the conjugate E regions along the same field line. The integrated field line conductivity is not significantly affected by the occurrence of Es at the conjugate E regions and its presence is not sufficient to inhibit the vertical drift and SF generation at the magnetic equator. Model results show that the presence of a vertical equatorial electric field (associated with the eastward electric field pre-reversal enhancement) is too week to affect the Es development at the conjugate stations.

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