A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.259364685965073  8.184348814269656  -0.0  -0.0  # for region 1
  7.254662067542346  7.129142878524909  -0.0  -0.0  # for region 2
  6.902398537074056  6.734653998755823  -0.0  -0.0  # for region 3
