KEPLER_PV

          Velocity-aligned  spectra as a function of radius. This is a 2-D image
    (equivalent to a Nrad column table) containing the spectra (averaged bright-
    ness temperature) for each of the Nrad radii defined  by  the  sampling  KE-
    PLER_RINT, KEPLER_RMAX and KEPLER_STEP.

      The  velocities  are  defined in KEPLER_SPECTRUM[1], but also derived from
    the axis description of this 2-D image.