Plasma density as function of distance r = R∕R_J from the planet center along the active magnetic tube when the harmonic numbers of the ion cyclotron frequency s vary from 2 to 8 (hard lines) and from 5 to 11 (dashed lines) for two possible positions of the active magnetic power tube λ_s = λ_Io = 117° and λ_s = 109°. Plasma concentration values that follow from the model are marked by circles, the lines represent exponential fitting lines.