P    #regions in PPM
# 2023-12-12 12:13:31 +0000  amg@AVANCE500
# low field   high field   mi   maxi
  4.658  4.6577  0.000  10000.000  # for region 1
  4.6577  4.6335  0.000  10000.000  # for region 2
  4.1245  4.101  0.000  10000.000  # for region 3
  0.0222  -0.0076  0.000  10000.000  # for region 4
