A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.436234762375364  7.447114952868419  115906.25  2.1335341365461824  # for region 1
  7.758919940882045  7.533507893669875  128031.25  -6.512178619756433  # for region 2
  2.3930317971942205  2.0420538002724014  128218.75  2.148607484769365  # for region 3
