A 1.0 #regions in PPM
# low field   high field  bias        slope
  11.964999946207  11.563396938753293  -0.0  -0.0  # for region 1
  2.9130200803364916  2.7782333514497615  -0.0  -0.0  # for region 2
  2.7096780324470275  2.5981303947476646  -0.0  -0.0  # for region 3
  1.6824064433084949  1.464952549275424  -0.0  -0.0  # for region 4
