A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.36020846993214  7.2990669440925915  122593.75  1.529217040875071  # for region 1
  7.6858381544453245  7.3585702072237815  130062.5  -0.26236007462686567  # for region 2
  2.4773842560222605  2.196150584101366  135375.0  6.507592190889369  # for region 3
