A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.526999079937953  8.36401560490873  1208000.0  -1490.4109589041113  # for region 1
  8.134357071913007  7.904698538917285  1528000.0  -1654.8671923258628  # for region 2
  7.57873158885884  7.37870641495934  1708000.0  -1965.2968036529692  # for region 3
