Altitude profiles of the perturbed velocities. $V_{\nabla p_{e1}}^{\Vert }\text{and }{V}_{\varphi 1}^{\Vert }$ driven by AW and GW mode are plotted in panels a and c, respectively. The perturbed electron velocity, V_e1, and the field-aligned perturbed neutral velocity, $V_{\text{n}1}^{\Vert }$, driven by AW and GW modes are displayed in panels b and d, respectively. The input parameters are τ = 4.2 min, λ_h = 80 km, $k_z^l=0.11$ km⁻¹, and c_p = 321 m s⁻¹ for the AW mode and are τ = 39.4 min, λ_h = 210 km, $k_z^l=-0.07$ km⁻¹, and c_p = 89 m s⁻¹ for the GW mode. Waves are propagated in the x–ɀ plane. The dip angle of the magnetic field is assumed to be zero degree.