A 1.0 #regions in PPM
# low field   high field  bias        slope  
  3.93367526674992  3.84237228637212  -0  -0  # for region 1
  1.71893630497507  1.45529436565121  -0  -0  # for region 2
  0.849907937523675  0.705436554917831  -0  -0  # for region 3