Ionospheric coupling, especially between ionogram-recorded spread-F and sporadic-E enhancements at an equatorial-anomaly crest station, Chung-Li

Details Ionospheric coupling, especially between ionogram-recorded spread-F and sporadic-E enhancements at an equatorial-anomaly crest station, Chung-Li Ionospheric coupling, especially between ionogram-recorded spread-F and sporadic-E enhancements at an equatorial-anomaly crest station, Chung-Li

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgra..107.1292b&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 107, Issue A10, pp. SIA 7-1, CiteID 1292, DOI 10.1029/2001JA007549

Physics

Space Physics

1

Ionosphere: Equatorial Ionosphere, Ionosphere: Ionospheric Disturbances, Ionosphere: Wave Propagation (6934)

Scientific paper

The analysis of ionograms recorded at Chung-Li, a station situated near the crest of the equatorial ionosphere anomaly, finds that there is coupling between the nighttime F2 and Es layers at the onset of spread-F, as is the case in midlatitudes. The results were obtained using isolated patches of spread-F occurrence of duration 2 hours or less and for sunspot-minimum years. It is suggested that the medium-scale traveling ionospheric disturbances (TIDs), which are responsible for the spread-F occurrence, influence both the F2 and Es levels almost simultaneously, as their travel is consistent with the evidence from these analyses, as well as that already available for midlatitudes. Some comments are made on the possibility that these medium-scale TIDs may be responsible directly for some of the small-scale irregularities observed at these equatorial latitudes.

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