GPS Denial Causes and Solutions Neil Gerein Moving
- Slides: 19
GPS Denial – Causes and Solutions Neil Gerein
Moving, or gathering data, you need to know where you are 2 Nov. Atel Inc. Proprietary
GNSS has become the gold standard for PNT, but denial is an issue
Signal blockage can deny GNSS 4 Nov. Atel Inc. Proprietary
SPAN: GNSS + INS GNSS solution Drifting INS solution True path SPAN solution Satellite line-of-sight 5 Nov. Atel Inc. Proprietary
Signal blockage can deny GNSS 6 Nov. Atel Inc. Proprietary
SPAN GNSS + INS to mitigate against signal blockage 7 Nov. Atel Inc. Proprietary
Spoofing attacks can deny your true location Desired route Spoofed route 8 Nov. Atel Inc. Proprietary Spoofed signal
Encrypted ranging codes protect against spoofers Source: www. navipedia. net 9 Nov. Atel Inc. Proprietary
You can’t spoof inertial measurements 10 Nov. Atel Inc. Proprietary
RF interference can significantly degrade GNSS Jammer Power (W) 100 k. W 100 W 1 W 100 m. W 11 Nov. Atel Inc. Proprietary
A 10 W jammer can deny GNSS for almost 50 km 12 Nov. Atel Inc. Proprietary
Null forming to change the antenna pattern 13 Nov. Atel Inc. Proprietary
40 d. B of jamming mitigation can significantly improve range of operations Jammer Power (W) 100 k. W 100 W 1 W 100 m. W 14 Nov. Atel Inc. Proprietary
40 d. B protection - can now navigate within 100’s of meters 15 Nov. Atel Inc. Proprietary
Photo source: “Gravity” – Warner Brothers Full constellation failure is extremely unlikely 16 Nov. Atel Inc. Proprietary
Electronic support – are you being jammed or spoofed? GPS L 1 spectrum plot 17 Jamming denies the GPS signal Nov. Atel Inc. Proprietary
Mitigating against GNSS denial – the technology exists 18 Anti-jamming Attitude Heading Timing Positioning Relative Positioning Nov. Atel Inc. Proprietary
Nov. Atel: Positioning Solved – Anytime, Anywhere