A 1.0 #regions in PPM
# low field   high field  bias        slope
  6.849330100467994  6.681404473933489  0.0  0.0  # for region 1
  6.162361628281382  6.009701967795468  0.0  0.0  # for region 2
  5.745091889619885  5.57716626308538  0.0  0.0  # for region 3
  3.149877661359352  2.610480194309124  0.0  0.0  # for region 4
