A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.86622990108303  7.736398922133116  0.0  0.0  # for region 1
  7.422186132741728  7.3381778522447245  0.0  0.0  # for region 2
  7.3381778522447245  7.260715671526708  0.0  0.0  # for region 3
  6.963959148212619  6.818853936445068  0.0  0.0  # for region 4
