© David Last The Need for R esilient PNT at Sea Professor David Last Strategic Advisor, General...
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© David Last The Need for Resilient PNT at Sea Professor David Last Strategic Advisor, General Lighthouse Authorities of the United Kingdom and Ireland Picture: earthobservatory.nasa. gov//ewsroom/ BlueMarble/ Resilient PNT Demonstrations 25 February – 1 March 2013 Harwich
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Transcript of © David Last The Need for R esilient PNT at Sea Professor David Last Strategic Advisor, General...
© David Last
The Need forResilient PNT at Sea
Professor David LastStrategic Advisor, General Lighthouse Authorities
of the United Kingdom and Ireland
Picture: earthobservatory.nasa.gov//ewsroom/BlueMarble/
Resilient PNT Demonstrations25 February – 1 March 2013
Harwich
Dover Strait – 28 days’ traffic records
© David Last
Satellite and Control System Failures
Official announcement:"A significant GPS anomaly occurred on 1 Jan 04, beginning at approximately1833Z ... (which) … affected precise timing and navigation users over largeportions of Europe, Africa, Asia, Australia, and … North America … and resultedin the transmission of Hazardously Misleading Information."
Sources: Vogel, Macabiau & Suard, ‘Effect of a GPS Anomaly on Different GNSS Receivers’, ION GNSS 2005, Long Beach, CA, Sep 13-16, 2005, Hoppe & Walterfang, ‘Investigation of a GPS Satellite Problem with respect to DGPS and GPS users’, European Journal of Navigation, May 2004,www.lr.tudelft.nl/live/pagina.jsp?id=400f4487-ed8c-4274-95cb-ebc2afa7385e&lang=en
SVN23 clock failure
© David Last
Solar flares
© David Last
Picture: www.flickr.com/photos/l23productions/1451697290/
A small jammer on this cliff-top disrupted GPS on vesselsout to ranges as wide as the Dover Strait
© David Last
Low-powered GPS jammer on ship
Jammer of less than 1 milliWatt: •False positions, and velocities •Autopilot may turn vessel•But no alarms!
With a little more jammer power:•Electronic Chart Displays•Autopilot•Automatic Identification System•Differential GPS•Satellite voice and data comms•Maritime distress safety system
plus …Ship’s Radar & Gyrocompass
© David Last
xx
Pictures: www.jammer-store.com/gj5-gps-l1-l2-l5-jammer-blocker.html
Jammers like this on our streets can block all frequencies ofGPS, GLONASS, Compass-Beidou and Galileo, plus theQZSS, GAGAN, WAAS and EGNOS augmentation systems.
Frequency bands shared bymultiple GNSSS transmissions
Jammer’s spectrum affects GPS, Galileo, Compass and GLONASS
© David Last
Picture: STAVOG Final Report, courtesy Spirent plc
© David Last
Picture: General Lighthouse Authorities of the UK & Ireland
Picture based on: http://www.amcsearch.com.au
© David Last
The Need forResilient PNT at Sea
Professor David LastStrategic Advisor, General Lighthouse Authorities
of the United Kingdom and Ireland
Picture: earthobservatory.nasa.gov//ewsroom/BlueMarble/
Resilient PNT Demonstrations25 February – 1 March 2013
Harwich
