A 1.0 #regions in PPM
# low field   high field  bias        slope
  5.522994993902007  5.269884765039282  -0.0  -0.0  # for region 1
  1.7198515550928692  1.5965414435956446  -0.0  -0.0  # for region 2
  1.5965414435956446  1.453761314493595  -0.0  -0.0  # for region 3
  1.453761314493595  1.2720411501818958  -0.0  -0.0  # for region 4
