A 1.0 #regions in PPM
# low field   high field  bias        slope
  4.9595160344610685  3.7708171180789214  -8898.0  -7.966467527461939  # for region 1
  4.933100502985909  4.728380134053428  -12740.0  7.901565995525727  # for region 2
  4.928891612741901  3.8258561176635615  -76796.0  -5.601869158878505  # for region 3
  4.928891612741901  4.744825120979756  -76796.0  10.170186335403727  # for region 4
