Detection and tracking in very shallow water

Abstract

In our previous work, we demonstrated a low power, m-sequence based, bistatic acoustic system that detected and tracked a -20 dB target at a range of 172 m in a water depth of 2 m. To our knowledge, similar results have not been obtained with non-biological systems. Unfortunately, we were not able to repeat these results under similar, or possibly better, environmental conditions. This work addresses the reasons for failure to reproduce our original experimental results and suggests an approach that should result in very shallow water detection and tracking at much longer range.