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http://dx.doi.org/10.5140/JASS.2002.19.4.243

UNCERTAINTIES INVOLVED IN THE IONOSPHERIC CONDUCTIVITY ESTIMATION  

곽영실 (경북대학교 천문대기과학과)
안병호 (경북대학교 지구과학교육과)
Publication Information
Journal of Astronomy and Space Sciences / v.19, no.4, 2002 , pp. 243-254 More about this Journal
Abstract
Various uncertainties involved in ionospheric conductivity estimation utilizing the electron density profile obtained from the Sondrestrom incoherent scatter radar are examined. First, we compare the conductivity which is based on raw electron density and the one based on corrected electron density that takes into account the effects of the difference between the electron and ion temperatures and the Debye length. The corrected electron density yields higher Pedersen and Hall conductivities than the raw electron density does. Second, the dependence of collision frequency model on the conductivity estimation is examined. Below 110 km conductivity does not depend significantly on collision frequency models. Above 110 km, however, the collision models affect the conductivity estimation. Third, the influence of the electron and ion temperatures on the conductivity estimation is examined. Electron and ion temperatures carrying an error of about 10% do not seem to affect significantly the conductivity estimation. Fourth, also examined is the effect of the choice of the altitude range of integration in calculating the height-integrated conductivity, conductance. It has been demonstrated that the lower and upper boundaries of the integration are quite sensitive to the estimation of the Hall and Pedersen conductances, respectively.
Keywords
ionospheric conductivity; incoherent scatter radar;
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