V Ray Koym

Because of the widespread use of the Global Positioning System (GPS) for positioning, navigation, and timing (PNT), concerns have been expressed that a disruption of GPS might require a national investment in backup capabilities. The authors assess the costs associated with realistic threats to domestic, nonmilitary uses of GPS, and review possible additions to the PNT ecosystem in light of those costs.

This study draws lessons regarding technological countermeasures to radioactive contamination caused by the Fukushima Dai-Ichi nuclear power plant accident. It focuses on contamination measurement, efforts to limit dispersal, decontamination, and storage of radioactive materials. The report analyzes technological successes and identifies capability gaps that could be redressed through novel technologies or improved use of existing technologies.