Physics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3515106m&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 15, CiteID L15106
Physics
5
Radio Science: Remote Sensing, Ionosphere: Ion Chemistry And Composition (0335), Ionosphere: Meteor-Trail Physics, Radio Science: Ionospheric Physics (1240, 2400), Radio Science: Interferometry (1207, 1209, 1242)
Scientific paper
Relatively little progress has been made in the study of equatorial Sporadic-E when compared to the study of mid-latitude Sporadic-E. Indeed, it is unclear if Sporadic-E has been observed at all near the geomagnetic equator using any technique other than the ionosonde. In particular, there have been no reports of Sporadic-E observed using the Jicamarca Radio Observatory (JRO) 50 MHz radar. The overwhelming-in SNR terms-presence of the nearly ubiquitous Equatorial Electrojet (EEJ) is the likely reason Sporadic-E has not been reported at JRO as well as at other similar radars near the geomagnetic equator. We present here what we believe to be the first Sporadic-E (defined here as altitude-narrow E-region layers that last tens of minutes) observations from JRO. The structure and characteristics of these equatorial Sporadic-E layers is compared with their mid-latitude counterparts. We also demonstrate the immediate effect of meteor-produced ionization on the formation and evolution of the equatorial Sporadic-E layers.
Malhotra Akshay
Mathews John D.
Urbina Julio
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