P    #regions in PPM
# 2020-03-17 16:09:59 +0100  Admin@HFD-002
# low field   high field   mi   maxi
  11.136868290913096  10.938124697142745  11.548  13.903  # for region 1
  10.558705109035712  10.193739600475615  10.044  12.711  # for region 2
  8.582109730992409  8.40504725654246  5.391  7.434  # for region 3
  7.5956188019141235  7.469145605878445  14.243  15.293  # for region 4
