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Published byPercival Charles Modified over 8 years ago
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GPS Denial – Causes and Solutions Neil Gerein
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NovAtel Inc. Proprietary Moving, or gathering data, you need to know where you are 2
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GNSS has become the gold standard for PNT, but denial is an issue
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NovAtel Inc. Proprietary Signal blockage can deny GNSS 4
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NovAtel Inc. Proprietary SPAN: GNSS + INS 5 GNSS solution Drifting INS solution True path SPAN solution Satellite line-of-sight
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NovAtel Inc. Proprietary Signal blockage can deny GNSS 6
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NovAtel Inc. Proprietary SPAN GNSS + INS to mitigate against signal blockage 7
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NovAtel Inc. Proprietary Spoofing attacks can deny your true location 8 Desired route Spoofed route Spoofed signal
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NovAtel Inc. Proprietary Encrypted ranging codes protect against spoofers 9 Source: www.navipedia.net
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NovAtel Inc. Proprietary You can’t spoof inertial measurements 10
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NovAtel Inc. Proprietary RF interference can significantly degrade GNSS 11 100 kW 100 W 1 kW 10 kW 10 W 10 mW 100 mW 1 W Jammer Power (W)
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NovAtel Inc. Proprietary A 10W jammer can deny GNSS for almost 50km 12
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NovAtel Inc. Proprietary Null forming to change the antenna pattern 13
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NovAtel Inc. Proprietary 40dB of jamming mitigation can significantly improve range of operations 14 100 kW 100 W 1 kW 10 kW 10 W 10 mW 100 mW 1 W Jammer Power (W)
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NovAtel Inc. Proprietary 40dB protection - can now navigate within 100’s of meters 15
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NovAtel Inc. Proprietary Full constellation failure is extremely unlikely 16 Photo source: “Gravity” – Warner Brothers
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NovAtel Inc. Proprietary 17 Electronic support – are you being jammed or spoofed? GPS L1 spectrum plot Jamming denies the GPS signal
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NovAtel Inc. Proprietary Mitigating against GNSS denial – the technology exists Anti-jammingAttitudeHeading PositioningRelative Positioning 18 Timing
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NovAtel: Positioning Solved – Anytime, Anywhere
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