Other
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm31a..02b&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SM31A-02
Other
2475 Polar Cap Ionosphere, 2403 Active Experiments, 2437 Ionospheric Dynamics, 2439 Ionospheric Irregularities, 2463 Plasma Convection
Scientific paper
A digital ionosonde (DPS-4) has been used at the Antarctic polar cap station Casey (-80.6o CGM latitude) (1996-2001) and polar cusp station Davis (-74.2o CGM latitude) (2002) in a study of ionospheric polar patches. The instrument operated in a variety of campaign modes and time resolutions, up to a maximum resolution of an ionogram and plasma drift velocity program every three minutes. Patches were identified from ionogram group range and critical frequency parameters and then compared with drift measurements and other geophysical data sets. A comparison of polar patch events with plasma drift velocity, (derived from DPS drift measurements), indicate that polar patches are often associated with fluctuations in horizontal drift velocity. This paper presents recent results on polar patch events observed at polar cap and polar cusp latitudes, and discusses possible causes of the observed plasma drift velocity fluctuations.
Breed A. M.
Dyson Peter L.
Morris James R.
Parkinson Murray L.
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