A 1.0 #regions in PPM
# low field   high field  bias        slope
  9.460360119233895  9.36247182184012  -0.0  -0.0  # for region 1
  7.970282703350884  7.939828566383932  -0.0  -0.0  # for region 2
  5.969010845522596  5.886349616612297  -0.0  -0.0  # for region 3
