depth         tsoi
      -0.009      293.309
      -0.031      294.545
      -0.068      296.159
      -0.128      297.840
      -0.227      298.690
      -0.391      298.324
      -0.661      298.137
      -1.106      298.139
      -1.840      298.143
      -3.049      298.147