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Session D6: Application/Impact of PNT Technologies in the Homeland Critical Infrastructure

A Resilient National Timing Architecture
Marc Weiss, Consultant; Patrick Diamond, RNT Foundation; Dana A. Goward, RNT Foundation
Location: Ballroom B
Alternate Number 1

Timing is essential to our economic and national security. It is needed to synchronize networks, for digital broadcast, to efficiently use spectrum, for properly ordering a wide variety of transactions, and to optimize power grids. It is also the underpinning of wireless positioning and navigation systems.
America’s over-reliance for timing on vulnerable Global Positioning System (GPS) signals is a disaster waiting to happen. Solar flares, cyberattacks, military or terrorist action – all could permanently disable space systems such as GPS, or disrupt them for significant periods of time.
Fortunately, America already has the technology and components for a reliable and resilient national timing architecture that will include space-based assets. This system-of-systems architecture is essential to underpin today’s technology and support development of tomorrow’s systems.
This paper discusses the need and rationale for a federally sponsored National Timing Architecture. It proposes a phased implementation using Global Navigation Satellite Systems (GNSS) such as GPS, eLoran, and fiber-based technologies. These were selected because they:
• Provide maximum diversity of sources and least common failure modes,
• Are mature, have repeatedly been demonstrated to perform at the required levels, and are ready to deploy,
• Have the potential for further development to increase accuracy, resilience, and cyber security,
• Are already supported, to varying degrees, by existing infrastructure, and
• Require relatively modest investments.



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