A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.41484769422505  7.424865612551515  58359.375  1.3020833333333333  # for region 1
  7.747057465448477  7.524825403669726  63718.75  1.480940934065935  # for region 2
  2.282680646321225  2.032695086149154  65296.875  4.1971916971916885  # for region 3
