c      Sod shock tube
c
 $rpcon     rhoL=3.0, pL=3.0, vxL=0.0, vyL=0.0, vzL=0.0, byL=0.0
          , bzL=0.0, bx0=0.0
          , rhoR=1.0, pR=1.0, vxR=0.0, vyR=0.0, vzR=0.0, byR=0.0
          , bzR=0.0
          , psi0=4*0.1, tag='sd', aspect=0.9
          , phdr="Sod shock tube", iftr=1                              $
