P    #regions in PPM
# 2025-12-09 18:29:09 +0200  SONY@DESKTOP-373AQPC
# low field   high field   mi   maxi
  12.006784388237456  11.569795701663821  0.530  3.594  # for region 1
  2.9370956913718405  2.7617466948720293  1.944  12.373  # for region 2
  2.7370882422392433  2.5562595895988127  1.532  7.954  # for region 3
  1.6855828331064373  1.3458187541818412  12.962  18.088  # for region 4
