P    #regions in PPM
# 2023-12-13 08:45:32 +0000  amg@AVANCE500
# low field   high field   mi   maxi
  4.6563  4.6432  0.000  10000.000  # for region 1
  4.1183  4.106  0.000  10000.000  # for region 2
  0.2091  -0.1981  0.000  10000.000  # for region 3
