This proposal by EOO, Inc addresses the development of a remote optical sensor that directly measures profiles of sound velocity in water along its line of sight. With scanning of the sensors line of sight, a 3-dimensional mapping of the sound velocity in the water volume can be obtained. The sensor proposed for development is laser induced Brillouin scattering, a technique that uses Doppler frequency analysis of the Brillouin backscatter. The general technical objective of our proposal is to greatly increase the Technology Readiness Level of remote 3-dimensional mapping of underwater sound velocity to support anti-submarine warfare (ASW) sensor systems. Specific objectives of Phase I are: (1) Review the concept in the context of currently available technology; (2) Define critical technology that will enable or enhance sensor performance; (3) Develop a physics based model and a conceptual sensor design that optimizes performance for platform imposed constraints using currently available technology; (4) Create an implementation plan for Phase II that will result in the fabrication and testing of a breadboard prototype instrument; (5) document the value for ASW sensor performance. Benefits The breadboard prototype resulting from this effort is expected to lead to early operational utility demonstrations aboard Virginia class submarines. Keywords SVP, lidar, environmental, sensor, remote, ASW performance, sound velocity profile, water optical extinction
