A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.661154574836355  3.624523749706344  -0.0  -0.0  # for region 1
  3.269783127394659  3.1656744664988388  -0.0  -0.0  # for region 2
  2.866844050964539  2.66441054366711  -0.0  -0.0  # for region 3