A 1.0 #regions in PPM
# low field   high field  bias        slope
  6.721418822152173  6.592470739233186  -0.0  -0.0  # for region 1
  4.285180846092701  4.223523567731655  -0.0  -0.0  # for region 2
  3.4939124404592765  3.391150309857533  -0.0  -0.0  # for region 3