A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.28851000790547  6.934770391748279  -0.0  -0.0  # for region 1
  6.875813789055413  6.588400350927695  -0.0  -0.0  # for region 2
  6.56629162491787  6.441008844195531  -0.0  -0.0  # for region 3
  3.640570216284431  3.515287435562092  -0.0  -0.0  # for region 4