Abstract: A node-based ground mesh system with Artificial Intelligence (AI) capability for ensuring redundancy and real-time attack mitigation as an independent augmentation system for the Global Positioning System (GPS) or Global Navigation Satellite System (GNSS) is provided. The system includes a plurality of nodes distributed across a geographic area forming a mesh network of nodes. A node can be fixed or in motion and has its precisely determined position and AI capabilities, in any given geographical location. Each node receives GNSS signals from one or more GNSS satellites and distributes its own real-time emulated PNT signal to the other nodes and a user receiver, that may be used for PNT in the event that the GNSS satellites' signals become compromised or are unavailable.