A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.42860553001762  8.414163094222525  -0.0  -0.0  # for region 1
  1.433652459926489  1.3961021268592404  -0.0  -0.0  # for region 2
  1.183316906144832  1.143840914971571  -0.0  -0.0  # for region 3
  -0.025280434622526285  -0.06715115446608544  -0.0  -0.0  # for region 4
