A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.162667841561063  8.058753281681664  181000.0  -679.6131354026079  # for region 1
  7.768509166156447  7.671761127648041  124000.0  -6.105466860182879  # for region 2
  7.643095042164068  7.560680046397649  254000.0  -664.8642533936642  # for region 3
  0.325431505022023  0.2264907910409683  124000.0  1563.076923076924  # for region 4
