A 1.0 #regions in PPM
# low field   high field  bias        slope
  4.591444491376513  4.504311122009325  -0.0  -0.0  # for region 1
  4.0371794473463485  3.9355238497512963  -0.0  -0.0  # for region 2
  3.1198586976195704  3.0157827286532077  -0.0  -0.0  # for region 3
  2.313875030973087  2.224321290234589  -0.0  -0.0  # for region 4