A 1.0 #regions in PPM
# low field   high field  bias        slope
  3.564917823625005  3.547023646038488  -0.0  -0.0  # for region 1
  3.292528675919135  3.201069546032492  -0.0  -0.0  # for region 2
  1.7516411615246121  1.622405434510878  -0.0  -0.0  # for region 3
  0.713778861506624  0.6302726994362111  -0.0  -0.0  # for region 4