Abstract
This paper presents a simple method for removing the surface-reflected component from the explosion waveform of signal underwater sound (SUS) charges detonated at shallow depths, in order to obtain accurate estimates of the source levels. The method is based on the repeated subtraction of time-shifted segments of portions of the source waveform that are uncontaminated by the surface reflection. The technique provides a method for an accurate estimation of the source levels for charges detonated at depths shallower than 90 m. The method is evaluated by comparing the source levels from the processed waveforms with results obtained by scaling source levels for deeper charges to depths of 58 and 18.3 m.
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