A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.710965578534925  7.6515953404418635  -0.0  -0.0  # for region 1
  7.641359092494784  7.576870730428184  -0.0  -0.0  # for region 2
  5.567865881186993  5.528468092392975  -0.0  -0.0  # for region 3
  5.096157220761321  5.04185216053173  -0.0  -0.0  # for region 4
