P    #regions in PPM
# 2020-05-05 16:15:37 +0200  Admin@HFD-002
# low field   high field   mi   maxi
  165.167840461594  155.65356393730866  0.083  0.232  # for region 1
  136.6250108887379  128.3000189299882  0.151  0.307  # for region 2
  122.87688131114555  114.31403243928872  0.130  0.379  # for region 3
