A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.895929496777626  7.715426194090385  -0.0  -0.0  # for region 1
  7.715426194090385  7.43551527543046  -0.0  -0.0  # for region 2
  7.43551527543046  7.245420009798487  -0.0  -0.0  # for region 3
  7.245420009798487  7.110260531940891  -0.0  -0.0  # for region 4
  2.572665429808287  2.387136672850959  -0.0  -0.0  # for region 5
  2.3562152133580705  2.090290661719233  -0.0  -0.0  # for region 6
  0.34481347494864595  0.23819658858089818  -0.0  -0.0  # for region 7