A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.102015360720996  3.0073398470185597  -0.0  -0.0  # for region 1
  3.0073398470185597  2.9182334811809727  -0.0  -0.0  # for region 2
  2.4559942083984905  2.3446112511015067  -0.0  -0.0  # for region 3
  2.1552602236966347  2.0605847099941985  -0.0  -0.0  # for region 4