A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.9612612739665076  3.8742876225225453  0.0  0.0  # for region 1
  3.288022927932993  3.2054280529458103  0.0  0.0  # for region 2
  2.646445155044859  2.5374326949050916  0.0  0.0  # for region 3
  1.8101776858489322  1.7729902456842574  0.0  0.0  # for region 4
