Physics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sunge...3...38d&link_type=abstract
Sun and Geosphere, vol.3, no.1, p.38-41
Physics
Scientific paper
Large Scale (LS) Field Aligned Currents (FAC) distribution at high latitudes is studied on the base of Intercosmos-Bulgaria-1300 satellite observations. It is shown that observed LS-FAC strength and thickness as a whole do not coincide with predictions of well-known empirical LS-FAC models. Possible reasons of this non-coincidence are suggested. Among them are: (a) errors due to identification of FAC regions with respect to satellite position; (b) incorrect selection of model input parameters; (c) smoothing of Magnetic Field (MF) measurements done in models' construction processes. To check some of the reasons mentioned, time intervals of nearly constant or slowly varying Solar Wind (SW) and Interplanetary Magnetic Field (IMF) parameters, when large-scale FACs can be considered in steady-state conditions are selected. We analyze the non-coincidence between the measured and modeled FACs both in magnitude and position and conclude that the smoothing of the MF measurements during model construction is the most probable source of the discrepancies found.
Danov Dimitar
Nenovski P.
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