A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.725548752039004  7.493368818363068  150687.5  5.420499342969772  # for region 1
  0.6800983124487902  -0.4832277483188772  145906.25  -2.7827029156816354  # for region 2
