'
   data type to represent input and output planes.  This data type
   makes the subroutine interfaces simpler and more uniform.

   The Mice routines that produce SPICE planes from data that
   define a plane are:

      <a href="cspice_nvc2pl.html">cspice_nvc2pl</a> ( Normal vector and constant to plane )
      <a href="cspice_nvp2pl.html">cspice_nvp2pl</a> ( Normal vector and point to plane    )
      <a href="cspice_psv2pl.html">cspice_psv2pl</a> ( Point and spanning vectors to plane )

   The Mice rou