> Pdiff at   915.53 seconds at   120.00 degrees for a      0.0 km deep source in the iasp91 model with rayParam    4.439 s/deg.
    0.00     0.0     0.0
    0.04    20.0     3.5
    0.08    35.0     5.9
    0.64   210.0    28.8
    1.38   410.0    53.6
    2.54   660.0    81.9
   49.20  2889.0   409.8
   70.80  2889.0   505.7
  117.46   660.0   833.7
  118.62   410.0   861.9
  119.36   210.0   886.7
  119.92    35.0   909.6
  119.96    20.0   912.0
  120.00     0.0   915.5
