Introduction to STL
STL Whitepaper
Protecting GNSS as the Primary Domain of PNT
PNT Concerns and STL Solutions for the Communications Sector
U.S. Government Reports and Publications

White House (OSTP/NSTC): National R&D Plan for Positioning, Navigation, and Timing Resilience (August 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 (June 2020)

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

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)

Industry Reports and Publications

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

C4ADS: Above Us Only Stars (March 2019)

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)