A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.787677707790356  3.6584054310739615  0.0  0.0  # for region 1
  3.3610791946262544  3.23180691790986  0.0  0.0  # for region 2
  1.499558409910175  1.38321336086542  0.0  0.0  # for region 3