A 1.0 #regions in PPM
# low field   high field  bias        slope
  2.562369357557824  2.407559542205372  -0.0  -0.0  # for region 1
  2.2741028048325687  2.1032781809953804  -0.0  -0.0  # for region 2
  1.5961425789787278  1.4947154585753974  -0.0  -0.0  # for region 3