由磁层整体电场模型得到的场向电流分布

本文概述了用GEOS-2号卫星等实测资料所修正的Volland大尺度对流电场模型, 并用该模型来计算场向电流.文中给出了由势函数计算场向电流的表达式, 并对弱磁活动下的电流分布进行了计算.结果与Iijima和Potemra的观测较吻合.这说明修正后的Volland电场模型是合理的, 从而进一步肯定了由GEOS-2号的观测结果所导出的若干磁层动力学特性的可靠性. 

Field-Aligned Currents Distribution Deduced From the Global Electric Field Model

In this paper the expressions of the Volland, s model of large-scale convection electric field revised by using the experimental data measured on board the satellite GEOS-2 and other sounders are summarized, and with this model the field-aligned currents are calculated. The expressions for the calculated field-aligned currents from the electric potential function are applied to the case of weakly disturbed conditions. The results of calculation are consistent with the observations by the satellite Triad (Iijima and Potemra, 1978). This means that the revised Volland, s model is reasonable and hence the magnetospheric dynamical characteristics derived from GEOS-2 are reliable.