Hall (K_H,s) and Pedersen (K_P,s) drag coefficients for electrons (s = e) and ions (s = i) averaged over all latitudes and over dayside atmosphere (−90^◦< ϕ ≤ 90^◦). K_H = K_H,i − K_H,e and K_P = K_P,i + K_P,e are the total Hall and Pedersen coefficients. The coefficients were calculated using the gas pressure-temperature profile from the ExoRad simulation run of WASP-18 b with anisotropic drag. The gray line shows K_P obtained directly from ExoRad. It diverges from the calculated K_P (blue line) in the upper atmosphere because the drag timescale in ExoRad is limited to τ_drag ≥ 100 s. The same applies for K_H from ExoRad (not shown here).