2022 Weems Award

Presented to: H. Logan Scott

Citation: For over 40 years of sustained contributions to GNSS assurance, including spectrum advocacy, invention of the Chimera authentication signal, and multiple resilient NTS-3 signal designs

Logan Scott

Mr. H. Logan Scott has been contributing to the advancement of navigation for more than 40 years in GNSS receiver design, adaptive arrays, signal design, and assured PNT. Mr. Scott’s contributions have been widely felt in both the civil and military communities and have resulted in more than 50 publications and 46 patents. Mr. Scott’s 46 patents describe inventions related to digital GPS receiver architectures, GPS receiver processing algorithms, GPS-based attitude determination, and geoencryption. They additionally cover diverse ideas in radar signal processing, cellular communications, and RFID systems with medical applications.

Over the past 20 years, Mr. Scott has been a tireless advocate for civil GNSS assurance. Mr. Scott is passionate about independent receiver certification, rapid jammer detection and geolocation, proof of location, and securing the GNSS spectrum against interference. Mr. Scott's efforts include several dozen editorials and interviews in GPS World and Inside GNSS, as well as numerous webinars, ION conference publications, and a textbook chapter on interference. Mr. Scott has directly contributed to national policy recommendations, participating in the DHS national risk assessment, and giving six invited briefings and a short course to the National Space-Based PNT Advisory Board.

After publishing the original concept in 2003, Mr. Scott participated in the creation of the baseline design and interface specification for the Chimera authentication signal. After the baseline design was completed, Mr. Scott was the primary force behind its widespread dissemination, and leveraged his international network of contacts to solicit valuable feedback for future revisions.

Mr. Scott has been a prolific member of the NTS-3 Advanced Signals Team, creating 14 original signal design concepts, at least nine of which will be tested on-orbit. For more than 40 years, Mr. Scott’s contributions to satellite navigation have made him one of the most widely recognized figures in the navigation community. Mr. Scott is an ION Fellow.