Parameters of background model atmosphere as function of height. Panel a: gas pressure of neutrals (blue), charges (orange), and magnetic pressures corresponding to the S magnetic field profile (green) and B profile (red). Panel b: number density of neutrals (blue), and charges (orange). For comparison, corresponding number densities from VALC model atmosphere are plotted in green and red. Panel c: temperature. Panel d: horizontal magnetic field, B_x0, of the two background profiles, S and B. Here and below, zero of z axis is considered to be the same as in VALC atmosphere.