Abstract
Solid spheres and spherical shells have been suspended in a water tank and insonified from below, thereby allowing the air‐water interface to serve as a reflective boundary. Backscattered echoes are analyzed in the time domain where temporal separation of the returns shed light on the scattering mechanisms. As time separation is not always possible, additional analysis is performed in the frequency domain, using the known form functions in an effort to analyze the complex return and extract target information.
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