A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.470746098909233  7.357967120768342  283000.0  3.294892915980231  # for region 1
  8.41785989423576  7.930735006955111  283187.5  5.015673981191224  # for region 2
  2.6273391383172715  2.1939636103474123  302062.5  2.818886539816773  # for region 3
  0.1286887253632323  -0.3784962510683303  270093.75  -3.8756773028296214  # for region 4
