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Research Topic Description, including Problem Statement:
In the age of Global Positioning System (GPS) denial, defining position and navigation (PN) by employing the Crustal Magnetic Field is an excellent solution for accurate PN where GPS denial or spoofing is a concern. One step in achieving this goal is to address the low resolution and areas with large voids, which current global magnetic anomaly maps provide. Artificial Intelligence (AI) approaches to address the shortfalls in crustal magnetic maps are promising.U.S. Military inertial navigation systems (INS) depend on the accuracy of the National Geospatial-Intelligence Agency’s (NGA) gravity maps. The threat of GPS denial in recent years highlights the importance of alternative navigation sources, like INS. The Crustal Magnetic Field could also be used for INS because it does not change with time. For INS to reach GPS’s centimeter-level accuracy, NGA must continue to improve current force models and create new accurate models, such as crustal magnetic field. This proposal demonstrates that AI via a neural network, in combination with existing measurements and satellite remote sensing, can greatly improve the resolution of crustal magnetic maps at every location on the globe, while substantially reducing production costs.
Example Approaches:
Map Automation: Leveraging bathometry, elevation, and crustal density as estimators, we aim for high-resolution crustal magnetism maps on a global scale by seeking AI and high-performance computing driven workflows capable of granular model estimation and big data processing. Fundamental leaps have been made in AI in recent years with deep architectures that learn the complicated relationships between endpoints of interest and key inputs, which are often complex, uncertain, and highly correlated. NGA has already demonstrated the potential of applying AI to automate the production of fine-scale gravity maps, including some data-poor areas. We envision a convolutional neural net trained to learn the relationship between marine and airborne track lines and bathometry, elevation (Tandem-X), and crustal density (CRUST) to produce fine-scale crustal magnetic field maps.
Relevance to the Intelligence Community:
Combining fine-scale crustal magnetic field maps with gravitational field maps will improve INS Position and Navigation (PN).This PN improvement will increase in relevance with the continued expansion of GPS denied areas, spoofing of GPS, and possibility of the loss of GPS globally.
Key Words: Artificial Intelligence, AI, Global Positioning System, GPS, Inertial Navigation Systems, INS, Modeling, Crustal Magnetic Field, Machine Learning, ML, Neural Network Position, Navigation PN, Satellite, Remote Sensing, Tandem-X
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