 GtLk6125  3 level grid zlon zlat dlon dlat for size-1 cells.  JGLi04Jun2025
  0.0  0.0  0.087890625  0.058593750
  ../tmpfls/   ../DatGMC/               Working and cell array dirs.
  0  Number of polar cells or polar parts. 0 implies no Arctic part.
  ../../GtLks6125Tx/ww3.    ../OutDatGtLk/      SWH and PropTest file dirs.

