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About

James J. Miller is a leading architect of space-based positioning, navigation, and timing (PNT) systems, with a career dedicated to enabling autonomous operations beyond Earth. His most prominent contribution is the **Lunar GNSS Receiver Experiment (LuGRE)** , a joint NASA–Italian Space Agency payload selected for the Firefly Blue Ghost Mission 1. LuGRE aims to demonstrate that Earth’s Global Navigation Satellite System (GNSS) signals can be used for real-time positioning and timing at the Moon—a breakthrough that could transform lunar navigation. This work has already garnered **40 citations** and is central to NASA’s Commercial Lunar Payload Services (CLPS) program. Earlier, Miller shaped NASA’s long-term vision for time distribution across the solar system. His 2007 paper on **NASA Architecture for Solar System Time Distribution** (6 citations) and his 2006 study on **Time Dissemination Alternatives for Future NASA Applications** (3 citations) laid foundational concepts for synchronizing clocks across robotic and human missions. As a key member of the Space Communication Architecture Working Group (SCAWG), he helped define the agency’s future communication and timing infrastructure. Miller’s work bridges the gap between terrestrial GNSS and deep-space navigation, making him a pivotal figure in the next era of lunar and interplanetary exploration.