EUV images from emissions of O+ (83.4 nm) and He+ (30.4 nm) distributi
ons in the plasmasphere and trough regions are constructed for a satel
tite at 9 R(e) (where R(e) is Earth radii). A diffusive equilibrium mo
del is used to describe the density distribution along the field lines
for ions in the plasmasphere, and a kinetic collisionless model is as
sumed to calculate ion densities in the high-latitude regions beyond t
he plasmapause. In our model of the plasmasphere, we assume that ions
move along a static dipole field. Observational data on O+ and He+ den
sities in the ionosphere are used as boundary conditions to calculate
the spatial distribution of densities along the field lines. Assuming
that the day and night boundary conditions are asymmetric and exobase
densities vary with latitude, we discuss how this would be reflected i
n the intensities and structure of the magnetospheric images.