A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.301717920933715  7.198876823455776  -0.0  -0.0  # for region 1
  2.9592946222974916  2.8002827506242665  -0.0  -0.0  # for region 2
  2.8002827506242665  2.6496399248285796  -0.0  -0.0  # for region 3
  2.5006709082084004  2.3014876163229925  -0.0  -0.0  # for region 4
