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© David Last 38th ILA Convention and Technical Symposium October 13-15, 2009 Portland, Maine USA Crime, GNSS Jamming & Enhanced Loran Professor David Last.

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Presentation on theme: "© David Last 38th ILA Convention and Technical Symposium October 13-15, 2009 Portland, Maine USA Crime, GNSS Jamming & Enhanced Loran Professor David Last."— Presentation transcript:

1 © David Last 38th ILA Convention and Technical Symposium October 13-15, 2009 Portland, Maine USA Crime, GNSS Jamming & Enhanced Loran Professor David Last Consultant Engineer & Expert Witness

2 © David Last TomTom Car Navigator GPS receiver + Computer Picture:

3 © David Last Plot of addresses extracted from TomTom car navigator

4 © David Last Multiple timed and dated tracks

5 © David Last Vehicle tracking system

6 © David Last Vehicle tracking system Checks to establish quality of evidence

7 © David Last How accurate is it, then? Scatter plot: 95% of GPS position measurements will lie within 5 metres of the true position provided … GPS receiver operating OK Installation OK Has acquired satellites Aerial can see sky No blockages No reflections No interference

8 © David Last GPS Jammer

9 © David Last Picture:

10 © David Last Picture: Professor Durk van Willigen GPS satellite radiates 100W From 20,000km range Illuminates 38% of Earth eg Europe + Africa + Atlantic

11 © David Last GPS Jammer - Spectrum

12 © David Last GPS & Mobile Phone Jammer

13 © David Last GSM 900MHz DCS 1800MHz 3G 2150MHz GPS 1575MHz

14 © David Last 2 Watt GPS & Mobile Phone Jammer Pictures:

15 © David Last GPS Jammer – GPS band Picture:

16 © David Last GPS Jammer – GPS & Galileo bands Picture:

17 © David Last GPS Jammer – GPS, Galileo & GLONASS bands

18 © David Last GPS jammer for both L1 and L2 L1 L2

19 © David Last Options to mitigate jamming and spoofing Picture: Datatrak Tracker Dead-reckoning Enhanced Loran

20 © David Last Pictures: Mitchell Narins, Federal Aviation Administration; Reelektronika bv Enhanced Loran (eLoran) On earth, high-powered Different from GPS! Digital 10m accuracy, precise time

21 © David Last So … where are we headed? GPS evidence vital in vehicle crime Forensic use of GPS growing rapidly GNSS-based systems now under attack Enhanced Loran is The Answer!


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