Filled contour plots for the number of dipped grid points along the line of sight for (a) model 1 and (b) model 2. In each plot the solar limb is shown by the dashed line, where the dotted lines denote the position angles at 290° and 312°. The black dashed box denotes the THEMIS/MTR field of view. For each of the contour plots the colour bar at the right-hand side gives the contour levels for the number of grid points.