Ray-based methods in PC SWAT

Abstract

The Personal Computer Shallow Water Acoustic Toolset (PC SWAT), developed at the Naval Surface Warfare Center Panama City Division (NSWC PCD), is a ray-based simulator capable of running multiple types of sonar simulation scenarios. Recent PC SWAT capability enhancements, such as arbitrarily shaped targets, target occlusion by sea bottom features, and parallelization efforts, will be discussed. These improvements foster greater physical accuracy and fidelity for target scattering simulations. [Work supported by the Office of Naval Research.]

Neural Volumetric Reconstruction for Coherent Synthetic Aperture Sonar

“…For SAS in particular, there have been several acoustic rendering models proposed in the literature. The Personal Computer Shallow Water Acoustic Tool-set (PC-SWAT) is a common underwater simulation environment that leverages finite element modeling [Sammelmann 2001] as well as extensions to ray-based geometric acoustics [Woods 2020]. HoloOcean is a more general underwater robotics simulator that enables simulation of acoustics [Potokar et al 2022].…”

“…Acoustic rendering by solving wave equations is physicallyrealistic but computationally expensive. While geometric acoustic renderers exist for simulating SAS measurements [Gul et al 2017;Woods 2020], they are not typically differentiable. Further, since SAS measurements can be collected on arbitrary paths [Callow 2003; (although they typically align with circular or linear scans in practice), it is difficult to precompute a simple forward model.…”