A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.31847585777249  7.243057557216769  -0.0  -0.0  # for region 1
  7.170539960528576  7.008100543947021  -0.0  -0.0  # for region 2
  6.860164646703107  6.781845642279858  -0.0  -0.0  # for region 3
  3.881141774752117  3.82602840126909  -0.0  -0.0  # for region 4