A 1.0 #regions in PPM
# low field   high field  bias        slope
  7.7160169127987395  7.61978295746815  -0.0  -0.0  # for region 1
  7.610051433895394  7.519764520748154  -0.0  -0.0  # for region 2
  7.517061319755722  7.419205443829673  -0.0  -0.0  # for region 3
  7.337028133659731  7.26998874904741  -0.0  -0.0  # for region 4
  7.0353509029042876  6.9558767937267785  -0.0  -0.0  # for region 5