Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa14a..05t&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SA14A-05
Physics
2411 Electric Fields (2712), 2415 Equatorial Ionosphere, 2435 Ionospheric Disturbances, 2439 Ionospheric Irregularities
Scientific paper
There is mounting evidence that large-scale wave structure (LSWS) is a more direct precursor of equatorial spread F (ESF) than the post-sunset rise (PSSR) of the equatorial F layer. Unambiguous experimental evidence, though limited, come from measurements by ALTAIR, a fully steerable incoherent-scatter radar, in situ measurements by low-altitude satellites in low-inclination orbits (AE-E, San Marco D), and total electron content measurements using satellites in low-inclination orbits. Less direct evidence is contained in seemingly extraneous traces in equatorial ionograms, which appear to be associated with LSWS and ESF. Clearly, a demonstration that these traces are indeed a direct consequence of LSWS is pivotal because such a demonstration would allow use of the extensive database of equatorial ionograms that exists to argue conclusively that LSWS is a central player in ESF generation. A demonstration of this kind will be presented, together with a description of experiments proposed for the Pacific sector, which involve the C/NOFS satellite, and how they will increase substantially our understanding of LSWS and ESF.
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