&GM_PARM01 
  GM_background_K    = 1.e+3,
  GM_taper_scheme    = 'gkw91',
  GM_maxSlope        = 1.e-2,
  GM_Kmin_horiz      = 100.,
  GM_Scrit           = 4.e-3,
  GM_Sd              = 1.e-3,
 &