xdata,z_echo
11.0,0.021730000000000353
110.89,-0.004527199999999619
210.78,-0.007200800000000116
310.67,0.2930412999999997
410.56,0.2827328
510.45,0.4520659999999997
610.34,0.6013154000000002
710.23,0.6254870999999999
810.12,0.9377695999999999
910.01,1.0116655999999997
1009.9,0.8878614999999997
1109.79,0.9635926999999996
1209.68,0.8336702999999998
1309.57,0.5904523999999998
1409.46,0.5491534000000001
1509.35,0.18309440000000005
1609.24,0.28982229999999987
1709.13,0.19426470000000023
1809.02,0.17952210000000018
1908.91,0.06551269999999995
2008.8,-0.05009910000000005
2108.69,0.037816600000000186
2208.58,0.031137700000000147
2308.47,0.1784446
2408.36,0.1949724000000002
2508.25,0.2418954
2608.14,0.2942279000000002
2708.03,0.5332699999999999
2807.92,0.7146792999999999
2907.81,0.6979545000000001
3007.7,0.7360069
3107.59,0.9048518999999996
3207.48,0.8526255999999995
3307.37,0.7897549000000001
3407.26,0.8742544999999998
3507.15,0.660142
3607.04,0.6521752000000001
3706.93,0.5401020999999998
3806.82,0.1280820999999998
3906.71,0.3066462000000002
4006.6,0.25279209999999985
4106.49,0.21971200000000016
4206.38,0.15127139999999978
4306.27,0.2314451
4406.16,0.3118985000000001
4506.05,0.48660540000000013
4605.94,0.4723345999999999
4705.83,0.6017249
4805.72,0.7237827
4905.61,0.7744281000000001
5005.5,0.6734415999999996
5105.39,0.6990941999999998
5205.28,0.5846926
5305.17,0.4859314000000002
5405.06,0.6776859
5504.95,0.6690992999999998
5604.84,0.47797589999999984
5704.73,0.4396128999999997
5804.62,0.37851610000000024
5904.51,0.27501739999999986
6004.4,0.3480321000000002
6104.29,0.30506940000000027
6204.18,0.19091090000000027
6304.07,0.5256096999999996
6403.96,0.44121630000000006
6503.85,0.39564440000000023
6603.74,0.4806301
6703.63,0.4111355999999998
6803.52,0.37862339999999983
6903.41,0.4676001
7003.3,0.36586090000000004
7103.19,0.6203839999999997
7203.08,0.6105076000000002
7302.97,0.5484406000000001
7402.86,0.5007209999999999
7502.75,0.5953993
7602.64,0.41222630000000027
7702.53,0.44898790000000005
7802.42,0.5292054999999999
7902.31,0.371827
8002.2,0.4985855999999998
8102.09,0.5962469000000001
8201.98,0.45751020000000014
8301.87,0.5259047999999997
8401.76,0.7106372999999997
8501.65,0.36577610000000027
8601.54,0.3762376999999999
8701.43,0.40014399999999994
8801.32,0.3611928000000002
8901.21,0.5191779
9001.1,0.3245904999999998
9100.99,0.7351960999999999
9200.88,0.46820769999999995
9300.77,0.3275102000000001
9400.66,0.30375609999999986
9500.55,0.28883480000000006
9600.44,0.5046395000000001
9700.33,0.6051051999999999
9800.22,0.38536559999999986
9900.11,0.1812183
10000.0,0.34663600000000006