  It is known that the combined action of convection and pitch-angle diffusion
is responsible for the formation of gas pressure distribution in the
magnetosphere. Plasma pressure, in turn, determines - within the framework of a
given magnetic field model - the density of bulk currents in the magnetosphere.
With a knowledge of the bulk currents as a function of coordinates, we can
calculate the field-aligned currents as a divergence of bulk currents. On the
other hand, specifying the convection model is equivalent to specifying the
electric field model. Since within the approximation of equipotential field
lines the electric field is common to the magnetosphere and ionosphere, bulk
currents and field-aligned currents in the ionosphere can be formally
calculated subject to the condition that ionospheric conductivity is wholly
determined by electron precipitation from the magnetosphere. The precipitation
intensity is readily inferred from the same magnetospheric model. Thus we have
two systems of field-aligned currents. One system is calculated from the model
of plasma pressure distribution in the magnetosphere, and the other is inferred
from a given model of the electric field and the electroconductivity model
calculated from electron precipitation. This brings up the question: How can
these two systems of field-aligned currents be reconciled? From previous
studies it is known that magnetospheric convection "adjusts itself" to the
level of energy losses in the ionosphere. Based on this, an attempt can be made
to achieve a conjugation of the aforementioned two systems of field-aligned
currents. This paper is devoted to analyzing such an attempt.
