TRACOR INC AUSTIN TEX
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This technical note compares receiver operating characteristic ROC curves generated by observers with clutter rate curves obtained by the digital computer sonar simulator for 6-ping histories of simulated sonar returns. The observers ROC curves were obtained by requiring the observers to indicate their confidence in decisions that a signal was present on each of several hundred film-strip frames. Each frame presented an independent simulated 6-echo cycle history at one of four signal-to-noise rations SN. It is shown that, for the 6-ping history situation at least, the computer generated curves are better than the observers curves in the sense of showing a larger probability of detection at the same false alarm rate at low probabilities of detection. The situation is reversed for high probabilities of detection, however. An explanation for this behavior is given.
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