Introduction to STL
STL Data Sheet
Protecting GNSS as the Primary Domain of PNT
STL for 5G and Other Commercial Applications
U.S. Government Reports and Publications

DHS (CISA): Time Guidance for Network Operators, Chief Information Officers, and Chief Information Security Officers (revised version; October 2022)

DHS, DOT, DoD: 2021 Federal Radionavigation Plan (July 2022)

DHS (S&T): Resilient PNT Reference Architecture v1.0 (June 2022)

DHS (S&T): Resilient PNT Conformance Framework v2.0 (May 2022)

DOC (NIST): A Resilient Architecture for the Realization and Distribution of Coordinated Universal Time to Critical Infrastructure Systems in the United States, NIST Technical Note 2187 (November 2021)

DOC (NIST): An Evaluation of Dependencies of Critical Infrastructure Timing Systems on the Global Positioning System (GPS), NIST Technical Note 2189 (November 2021)

DHS (S&T): Fact Sheet – “Resilient PNT for Critical Infrastructure” (November 2021)

White House (OSTP/NSTC): National R&D Plan for Positioning, Navigation, and Timing Resilience (August 2021)

DHS (CISA): Fact Sheet – “Understanding Vulnerabilities of Positioning, Navigation, and Timing” (July 2021)

DHS (HSOAC): Analyzing a More Resilient National Positioning, Navigation, and Timing Capability (May 2021)

DOC (NIST): Foundational PNT Profile: Applying the Cybersecurity Framework for the Responsible Use of Positioning, Navigation and Timing (PNT) Services (February 2021)

DOT (OST-R): Complementary Positioning, Navigation, and Timing (PNT) and GPS Backup Technologies Demonstration Report (January 2021)

White House: Memorandum on Space Policy Directive 7 (January 2021)

DHS (S&T): Resilient PNT Conformance Framework (December 2020)

White House: National Space Policy (December 2020)

DOC (NIST): What is PNT? (video) (September 2020)

DHS (CISA): Time Guidance for Network Operators, Chief Information Officers, and Chief Information Security Officers (original version; June 2020)

DHS (CISA): Report on Positioning, Navigation, and Timing (PNT) Backup and Complementary Capabilities to the Global Positioning System (GPS) (April 2020)

DHS, DOT, DoD: 2019 Federal Radionavigation Plan (December 2019)

DOC (NIST) (developed by RTI International): Economic Benefits of the Global Positioning System (GPS) (June 2019)

Congressional Research Service: Cybersecurity: Critical Infrastructure Authoritative Reports and Resources (April 2017)

DHS: “GPS Vulnerabilities for Critical Infrastructure” (April 2016)

DHS (OCIA): The Future of Smart Cities: Cyber-Physical Infrastructure Risk (August 2015)

DHS: “Critical Infrastructure Vulnerabilities to GPS Disruptions” (June 2014)

Presidential Policy Directive: “Critical Infrastructure Security and Resilience” (PPD-21) (February 2013)

U.K. Government Reports and Publications

Government Office for Science, Satellite-derived time and position: a study of critical dependencies (Blackett Review) (January 2018)

Royal Institute of Navigation, UK Space Agency, Innovate UK, and London Economics: The economic impact on the UK of a disruption to GNSS (June 2017)

Industry Reports and Publications

C4ADS: Above Us Only Stars (March 2019)