Abstract
ABSTRACTThe nth‐order moments of the electromagnetic impulse response are useful for interpreting electromagnetic data. We have derived an analytic expression for the half‐order moment of a conductive half‐space. By inverting this expression, the measured half‐order moment can be used to estimate an apparent conductivity of the ground. The first‐order moment can also be used to estimate the half‐space conductivity. A sensitivity analysis indicates that for an airborne EM configuration, the half‐order moment will be most sensitive to material in the top 26–48 m, while the first‐order moment will be sensitive to deeper material (down to depths between 66 and 127 m).
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