A 1.0 #regions in PPM
# low field   high field  bias        slope
  1.3078767669524085  1.2606988475032235  -0.0  -0.0  # for region 1
  1.2301205663787516  1.2117735977040685  -0.0  -0.0  # for region 2
  -0.02271529454960763  -0.08037719609861162  -0.0  -0.0  # for region 3
