% distance from wellhead(m) amplitude of Ex field (V/m) 4.5000000e+00 1.2800000e-04 9.0000000e+00 3.8041667e-05 1.5000000e+01 2.1111667e-05 2.1000000e+01 1.3500000e-05 2.7000000e+01 1.0016667e-05 3.3000000e+01 1.1883333e-05 3.9000000e+01 1.2500000e-05 4.5000000e+01 1.1733333e-05 5.1000000e+01 1.1866667e-05 5.7000000e+01 1.2166667e-05 6.3000000e+01 7.2000000e-06 6.9000000e+01 6.7000000e-06 7.5000000e+01 4.9833333e-06 8.1000000e+01 3.9166667e-06 9.5000000e+01 2.0000000e-06 1.1500000e+02 6.6666667e-07