Adaptive Cancellation of Magnetic Background Noise for Anti-Submarine Warfare

To address the Navy’s need for magnetic noise mitigation algorithms to improve the range and performance of magnetic anomaly detection sensors to support anti-submarine warware, Physical Optics Corporation (POC) proposes to develop a new Sensor Integrated Magnetic ELF/ULF Noise Mitigation (SIMENM) system based on a customized POC 3D geometric magnetic compensation (GMC) framework and a network of COTS ancillary sensors. The innovation in self-identification, isolation, and mitigation of correlated, non-linear, and non-Gaussian noise will enable the system to significantly reduce the platform and environmental noise level in the measurements of a highly sensitive scalar magnetometer and achieve the stated noise reduction goal: 40 (threshold)/10 (objective) pT/root Hz @ 0.05 Hz and 1 (threshold)/0.3 (objective) pT/root Hz from 1 to 10 Hz. The adaptive cancellation is achieved through a bidirectional state updating process, forward propagation of uncertainties, and backward propagation of constraint errors. In Phase I POC will demonstrate the feasibility of SIMENM by identifying, designing, and integrating key system components into a subscale demonstration prototype. In Phase II we plan to develop a full-scale sensor prototype that can be tested, evaluated, demonstrated, and adapted for insertion into ongoing acquisition programs, including Littoral Antisubmarine Warfare and Air Antisubmarine Warfare.