A 1.0 #regions in PPM
# low field   high field  bias        slope
  10.935202644888786  10.839607942938029  -0.0  -0.0  # for region 1
  8.69807694586508  8.631925739265107  -0.0  -0.0  # for region 2
  7.612229091187434  7.541237552397216  -0.0  -0.0  # for region 3
  7.181439526255885  7.113674875592496  -0.0  -0.0  # for region 4
