P    #regions in PPM
# 2011-06-15 11:25:13 -0500  mfjofre@kerry
# low field   high field   mi   maxi
  3.8099830549233253  3.7110979985360024  5.524  8.363  # for region 1
  3.2651457834559183  3.051864289287183  1.962  8.828  # for region 2
  2.902567243369068  2.78041511489061  1.549  6.453  # for region 3
  2.6505072957151072  2.547744393979262  3.252  6.246  # for region 4