A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.203036539785192  7.155431404651524  143343.75  1.576625838436862  # for region 1
  7.483517916947338  7.26945348149467  160468.75  -14.889443651925818  # for region 2
  3.306111220817635  3.0345804256060784  154406.25  -0.0  # for region 3
