Mutual position of drift trajectories and projections of geomagnetic latitudes in the magnetosphere

We have used the magnetic field model developed by Ostapenko and Maltsev (J . Geophys. Res. 102(A8), 17,467-17,473 1997) for calculations of the drift trajectories of the charged particles and for mapping geomagnetic latitudes and longitudes to the equatorial plane of the magnetosphere under various geomagnetic conditions. The model is valid for distances from 3 to 10 R-E. It depends on the Dst and Kp-indices, solar wind pressure, IMF vertical com ponent and tilt angle of the Earth dipole. The model provides better agreem ent with measurements than previous ones. (C) 1999 Elsevier Science Ltd. Al l rights reserved.