A 1.0 #regions in PPM
# low field   high field  bias        slope
  6.085676400465052  5.687051308731533  -0.0  -0.0  # for region 1
  5.687051308731533  5.34157622922915  -0.0  -0.0  # for region 2
  4.371588506010921  4.052688432624106  -0.0  -0.0  # for region 3
