A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.816052080468689  7.746095552490531  -0.0  -0.0  # for region 1
  7.383593543876442  7.313637015898284  -0.0  -0.0  # for region 2
  2.4643776901396404  2.413500215246435  -0.0  -0.0  # for region 3
  1.4245692970097548  1.370511979935724  -0.0  -0.0  # for region 4