A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.780106733644552  7.218112567783094  128000.0  -250.32594524119946  # for region 1
  5.14575908116897  4.935011268970923  128000.0  -666.6666666666667  # for region 2
  3.4949012189509387  3.0734055945548455  128000.0  -333.62293657688963  # for region 3
