A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.844563137293115  7.752070130515892  -0.0  -0.0  # for region 1
  7.752070130515892  7.642234684967942  -0.0  -0.0  # for region 2
  7.411002168024887  7.226016154470444  -0.0  -0.0  # for region 3
  7.046810953839577  6.960098759985931  -0.0  -0.0  # for region 4
  2.6765163836158523  2.572461750991478  -0.0  -0.0  # for region 5