Fig. 4.
The speed of O2+ ions near Mars in the 60 nT case. Note that the horizontal color map in the range [0,50] km s−1 shows the velocity on the y = 0 plane (panel a) and on the z = 0 plane (panel b) while the vertical color panel on the right in the velocity range [0,8] km s−1 gives the velocity on the spherical shell of the radius 3700 km just above the model exobase.