A 1.0 #regions in PPM
# low field   high field  bias        slope
  5.418361935085571  5.257160264924568  0.0  0.0  # for region 1
  1.4880025292700947  1.4317965020033172  0.0  0.0  # for region 2
  1.4330455248314677  1.3951584990442325  0.0  0.0  # for region 3
  1.236532599869105  1.1874043686285143  0.0  0.0  # for region 4
