A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.30817969217212  8.21492091838248  -0.0  -0.0  # for region 1
  7.507784002560071  7.438971703453153  -0.0  -0.0  # for region 2
  7.4000384289584495  7.347523779640012  -0.0  -0.0  # for region 3
