A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.364106956057418  7.388202584783744  127606.33600665559  2.7202071353936006  # for region 1
  7.925619150370287  7.660765546984647  132750.0  5.112327188940095  # for region 2
  7.665118339310362  7.4138551240383626  141750.0  -3.9489671931956227  # for region 3
  2.2308694155811035  1.8722426537382784  134781.25  0.45212765957446877  # for region 4
