To the problem of the Venus magnetic barrier

The analytical description of the Venus magnetic barrier on the basis of mathematical models of body flow-around with plasma is suggested. Calculated characteristics of the magnetic barrier and experimental data are compared. Expressions obtained for the thickness of the magnet+c barrier and magnetic field depend on an angle between vectors of field intensity and planet velocity in an undisturbed flow and on the place of a considered point inside the magnetic barrier. The evaluation performed shows that the condition of the magnetic barrier existence is met at Msub(A)sup(2) > or approximately 10 (Msub(A) - Mach Alvfen number) and in that case the dissipation processes affect the height of an upper boundary of the magnetic barrier and size of magnetic field in it. The upper boundary of the Venus magnetic barrier according to the expressions obtained is at a height h approximately 0.1 R=600 km relative to ionopause which, apparently, does not contradict the experimental data