A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.5303488285979485  7.4899361831641045  0.0  0.0  # for region 1
  7.487670053513609  7.4610430301202815  0.0  0.0  # for region 2
  7.460287653570116  7.429128370875798  0.0  0.0  # for region 3
  7.427806461913009  7.379840050977512  0.0  0.0  # for region 4
  7.353590715859267  7.312045005600175  0.0  0.0  # for region 5
