Abstract: In compression region, high frequency modulational field radiated by antenna system of moving bodies in ionosphere could influence the density distribution of charged particles. A numerical simulation of non-steady interaction between moving bodies and plasma in compression region is presented. This simulation used FTCS method, considering two-dimensional three-component axis symmetrical model. The evolutions of the density disturbance and the electric field with time have been obtained.The outcomes have told us that the non-linear interaction can lead to the collapses of field and the cavitations of density. By detecting the evolution of the cavitations of density,we can trace out the stealth vehicle.

Key words: compression region, high f requency modulational field, stealth vehicle