A 1.0 #regions in PPM
# low field   high field  bias        slope
  4.187996961245143  4.006494685236125  -0.0  -0.0  # for region 1
  3.945993926566451  3.582989374548413  -0.0  -0.0  # for region 2
  2.3393626685606903  2.2116388447024913  -0.0  -0.0  # for region 3
  1.5931866449680563  1.5057966602229729  -0.0  -0.0  # for region 4