Properties of the cloud model electric field as a function of the dimensionless parameter K described in the text. Upper panel: magnitude of the cloud internal electric field as a fraction of the external (undisturbed) solar wind electric field. Middle panel: angle of the cloud electric field from the −V_i direction. Lower panel: net electric field in the comet reference frame along the solar wind electric field direction (red line) and in the anti-sunward direction (black line) as a fraction of the undisturbed solar wind electric field.