c      Ryu & Jones, Fig. 4d
c
 $rpcon     rhoL=1.0, pL=1.0, vxL=0.0, vyL=0.0, vzL=0.0
          , byL=0.0, bzL=0.0, bx0=0.7
          , rhoR=0.3, pR=0.2, vxR=0.0, vyR=0.0, vzR=1.0
          , byR=1.0, bzR=0.0
          , psi0=4*0.1, tag='4d', aspect=0.9
          , phdr="Ryu & Jones (1995), Figure 4d", iftr=1               $
