A 1.0 #regions in PPM
# low field   high field  bias        slope
  12.273447062317326  10.213339162869746  -0.0  -0.0  # for region 1
  8.626609818010936  8.50348247002862  -0.0  -0.0  # for region 2
  8.443457887887243  8.3003223458578  -0.0  -0.0  # for region 3
  8.175031347014205  7.891630260317712  -0.0  -0.0  # for region 4
