A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.59379257357728  7.338089299760661  69437.5  -3.6172434367541744  # for region 1
  2.3961067051073175  2.0836610121270023  66906.25  1.129150390625  # for region 2
  2.328738015725742  2.295863804897107  70000.0  19.96527777777778  # for region 3
  1.825013915288993  1.7029324855814527  65031.25  0.234375  # for region 4
