A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.2612572934671  7.166669507024458  136437.5  1.7356265699134799  # for region 1
  7.497913992171529  7.373024449600532  163000.0  -39.6341463414634  # for region 2
  -0.18983202203103933  -0.4770137989497911  124875.0  0.13283740701381508  # for region 3
