A 1.0 #regions in PPM
# low field   high field  bias        slope
  10.89549338477551  9.671724200253623  -0.0  -0.0  # for region 1
  3.6951247442660122  3.5723260367526404  -0.0  -0.0  # for region 2
  3.388127975482582  3.1871846359152465  -0.0  -0.0  # for region 3
  2.102462719547127  1.935009936574347  -0.0  -0.0  # for region 4