A side scan sonar system for autonomous underwater vehicles

A side scan sonar architecture optimized for use in the Naval Undersea Warfare Center, Newport, Rhode Island (NUWCNPT) 21" diameter autonomous underwater vehicle (AUV) is presented. The system design is based on an enhanced version of the Klein System 2000 side scan sonar. The primary goal of this sonar development program was to produce a high performance dual frequency side scan sonar, with associated recording and power systems, that is optimized for use in small, autonomous vehicle applications. A key requirement in the sonar design was the mitigation of the electronic interference frequently observed in multi-sensor vehicle applications. The developments of new balanced impedance transducers, very low noise differential input transceiver electronics, specialized interface electronics, and the application of low noise power and ground distribution methods are presented. The role that each of these technologies plays in an overall noise mitigation strategy is discussed. System level performance criteria, including sonar operating range, system resolution, storage media, endurance, and power/weight/volume requirements are also presented. Finally, laboratory test data of the system is presented.