Non-Collinear Wavefront Curvature Ranging Technology

This document is a technical report detailing the development and implementation of non-collinear wavefront curvature ranging technology for the U.S. Navy's submarine force. The report outlines the challenges faced by the Navy in enhancing situational awareness and tracking capabilities through improved detection and intercept of active emissions. It describes the requirements for developing non-collinear sensors and TDOA estimation algorithms, which are essential for accurate target localization. The technology section explains the successful transition from Phase I to Phase II, where real-time systems were tested at sea using commercial off-the-shelf hardware and novel algorithms. The report also discusses the awarded contracts for further development and the benefits of the technology in anti-submarine warfare scenarios, emphasizing its role in providing precision positioning in GPS-denied environments. Additionally, it highlights future objectives for enhancing data collection and analysis to meet critical test requirements for the Navy's submarines.