P    #regions in PPM
# 2020-03-17 16:57:55 +0100  Admin@HFD-002
# low field   high field   mi   maxi
  11.110123774086384  10.596981644885831  6.050  7.583  # for region 1
  8.83877372933045  8.659770661004675  2.187  3.664  # for region 2
  7.669287016268725  7.526084561608106  1.903  3.493  # for region 3
  7.267524574026432  7.156144887068172  4.800  6.788  # for region 4
