A 1.0 #regions in PPM
# low field   high field  bias        slope
  8.382805183218126  7.2512419491198115  122656.25  1.6203078584931139  # for region 1
  7.6755931022533055  7.343653411232206  129937.5  -1.06370745170193  # for region 2
  2.6326165038205684  2.1938470865171404  134531.25  -0.19585654596100277  # for region 3
