Ratio    if  Frequency, Hz  ip  Slowness, s/m   ip Record   1/4-Wave Depth, m  Avg. Shear Velocity, m/s
  0.96612  13         1.2695   5        5.56E-04  0       0        355                 1800
   1.0027  15         1.4648   7        7.78E-04  0       0        219                 1286
   1.0535  19         1.8554   9        1.00E-03  0       0        135                 1000
  0.96981  23          2.246  10         0.00111  0       0        100                  901
   1.0038  28         2.7343  11         0.00122  0       0         75                  820
  0.95136  32          3.125  12         0.00133  0       0         60                  752
   1.0016  34         3.3203  13         0.00144  0       0         52                  694
  0.85174  37         3.6132  16         0.00177  0       0         39                  565
  0.85468  40         3.9062  18         0.00199  0       0         32                  503
   1.0587  44         4.2968  20         0.00222  0       0         26                  450
   1.0949  51         4.9804  24         0.00266  0       0         19                  376
  0.99121  55          5.371  27         0.00299  0       0         16                  334
  0.97178  60         5.8593  30         0.00333  0       0         13                  300
   1.0518  64           6.25  33         0.00366  0       0         11                  273
   1.5192  74         7.2265  34         0.00377  0       0         9                   265