A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.7077414150145245  7.649552446350463  56119.68994140625  65.30612244897965  # for region 1
  4.572427906075965  4.520364092008121  134750.0  -320.77625570776206  # for region 2
  3.1490951067800306  3.0694680970292105  73000.0  58.955223880597046  # for region 3
