A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.1141816813240024  2.9528161912904336  0.0  0.0  # for region 1
  2.8253317116197847  2.7845596483016943  0.0  0.0  # for region 2
  2.7524014011775666  2.696124468710343  0.0  0.0  # for region 3
  2.696124468710343  2.5847191126017584  0.0  0.0  # for region 4
