Robust and Resilient PNT: Today’s Requirement Dr Sally Basker CGSIC, Savannah, 21 September 2009.

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Presentation transcript:

Robust and Resilient PNT: Today’s Requirement Dr Sally Basker CGSIC, Savannah, 21 September 2009

Loran Omega Decca Pulse 8 Toran Lorac Raydist N Raydist DRS Hyperfix Hydrotrac Argo Spot Geoloc Trident Transit Maxtran Syledis Artemis Miniranger MicroFix Trisponder GPS

Source:

GPS is vulnerable at system, signal and user levels System Vulnerability ExamplesPossible Mitigation Signal User Satellite clock failures (e.g. SVN23, 1 Jan 2004) Poor signal quality (e.g. evil waveforms) Design flaws (e.g. Block IIR ranging code interruptions) Intentional interference (e.g. potential terrorism) Unintentional interference (e.g. Moss Landing) Ionospheric effects (e.g. scintillation at high latitudes or equator) Equipment malfunction (e.g. Royal Majesty, 1995) Signal occultation (e.g. Urban canyons) Local Interference (e.g. Manatoulin TV set) Second system or augmentation (e.g. Galileo, eLoran, SBAS) Second system or augmentation (e.g. Galileo, eLoran, SBAS) Second system or augmentation (e.g. Galileo, eLoran, SBAS) Second dissimilar system (e.g. eLoran) Second system, other GNSS frequencies (e.g. e-Loran, L2C, L5) Second dissimilar system (e.g. e-Loran) Second dissimilar system (e.g. eLoran) More SVs &/or second dissimilar system (e.g.Galileo, SBAS, eLoran) Improved siting &/or second dissimilar system

Source: David Last. GPS Forensics, Crime & Jamming. 2nd GNSS Vulnerabilities and Solutions Conference, 2-5 September 2009, Baška, Krk Island, Croatia

CHRONOS TECHNOLOGY

The Demand

A Week of AIS tracks recorded in April Over 33,000 vessels transit the area annually Trinity House moved UB38 in June 2008

LT Cortesia Grounding, 2 January 2008 Varne LV

East Goodwin Light Vessel

Delivering a reliable, efficient and cost-effective AtoN service for the benefit and safety of all mariners