A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.912532390562411  7.775002858860863  0.0  0.0  # for region 1
  7.4953594777343815  7.3165710865223685  0.0  0.0  # for region 2
  3.387810797581473  3.3282146671774684  0.0  0.0  # for region 3
