Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa21a1517d&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SA21A-1517
Physics
2411 Electric Fields (2712), 2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 6929 Ionospheric Physics (1240, 2400)
Scientific paper
The Sao Luis (2.33 S, 44 W, dip latitute 1.3 S) 30 MHz coherent scatter radar has been in operation since December 2000 sounding the equatorial electrojet, the 150-km echoes and the F region 5 m irregularities. In this work, we present a statistical study of the F region plume parameters as a function of the solar flux. Such parameters are plume minimum and maximum heights, size, duration, time of triggering, altitudinal bottom-type layer gradient and number of plumes. In many nights quasi-periodic plumes were observed and during minimum solar activity the plumes rarely overpass the altitude of 600 km. This statistics is important to give ground support and validation for the C/NOFS satellite mission (launched on April 2008) during the solar minimum activity. The Sao Luis radar has also been measuring equatorial vertical drifts which controls the altitude of plasma ascending to the topside. The electric field estimates inferred from the vertical drifts can also provide support for the C/NOFS mission.
de Camargo L. A.
de Paula Eurico R.
Kherani Alam E.
Muella M. T.
Rodrigues Fabiano S.
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