A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.785263500579476  7.679494173482267  -0.0  -0.0  # for region 1
  7.349365667694006  7.269237389590058  -0.0  -0.0  # for region 2
  4.342952673233918  4.282055181874918  -0.0  -0.0  # for region 3
  3.455131351842187  3.4006441227315034  -0.0  -0.0  # for region 4