抄録
Auroral electrodynamics data from various experimental data sets are analysed and the cases are selected with steady conditions, homogeneous auroral bands and visual arcs (as seen by all-sky cameras from the ground) and with predominantly zonal flow in the middle and equatorial auroral oval away from the Harang discontinuity. Exclusion of dynamic cases with moving and bursty rayed arcs is needed to avoid the ambiguity of magnetometer measurements from a satellite due to possible contamination of the perpendicular component of the magnetic field of stable sheet currents by similar field variations due to Alfven waves. The schematics of electrodynamical patterns from these cases are described and substantiated by experimental data. It consists of hierarchy of encircled two-sheet current loops (so called Bostrom type current loop) of different scales from the largest one of the Region 1/Region 2 FAC's, to intermediate one of the inverted-V of order of 100km wide, to the smallest one of an auroral arc scale of about 10km wide, all having the same direction of the closing ionospheric current (the so called “Matreshka anodel”, named after Russian folkloric toy of several wooden dolls one inside another).
Examples of coordinated space/ground based measurements of auroral electrodynamic patterns taken from original observations and found from published data of other (mostly rocket) experiments selected with the above criteria are analysed and are shown to be generally consistent with the Matreshka schemiatics.
