A 1.0 #regions in PPM
# low field   high field  bias        slope
  4.035458434897666  3.905450109031117  28000.0  -11.235955056179776  # for region 1
  3.614231459090049  3.437420135911543  28000.0  -8.281573498964804  # for region 2
  3.432219802876881  3.333413475218304  28000.0  -14.814814814814815  # for region 3
  2.896585500306701  2.792578839613462  28000.0  -14.084507042253522  # for region 4
  2.5741648521576606  2.3193485334592254  28000.0  -5.747126436781609  # for region 5
  0.9776626105164448  0.8164522864419247  28000.0  -9.070294784580499  # for region 6
