A 1.0 #regions in PPM
# low field   high field  bias        slope
  4.668945188234321  3.8104404152916596  -8438.0  -6.938900747065102  # for region 1
  4.660290880318622  3.900846169862954  -141036.0  -3.5363499245852186  # for region 2
