A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.781549905471627  7.664909971128369  -0.0  -0.0  # for region 1
  7.464955797968498  7.281664472571951  -0.0  -0.0  # for region 2
  2.6049585336660903  2.527198577437252  -0.0  -0.0  # for region 3
  1.5940791026911898  1.4829934509357061  -0.0  -0.0  # for region 4