A 1.0 #regions in PPM
# low field   high field  bias        slope
  2.74544262450159  2.63150859323044  258000.0  176.63656884875863  # for region 1
  2.6033313596902627  2.513899270627962  258000.0  176.63656884875863  # for region 2
  0.12052485179104692  -0.12521192936069875  82000.0  47.172283134472956  # for region 3
