A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.819322621481223  7.644500367748919  -0.0  -0.0  # for region 1
  7.565035706961508  7.326641724599276  -0.0  -0.0  # for region 2
  3.1044194147615154  2.96668066939667  -0.0  -0.0  # for region 3
  2.4898927046722052  2.0607835364201867  -0.0  -0.0  # for region 4
  0.010595288104988106  -0.021190576209976213  -0.0  -0.0  # for region 5