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Session D5: NAVWAR: User Technologies

Raytheon Alternate Navigation & Sensor Fusion Approach
Kristin Makowski, Jim Landon, Taehwan Kim, Jarrett Perry, Raytheon, Space and Airborne Systems
Date/Time: Wednesday, Aug. 25, 4:25 p.m.

The vulnerabilities of the Global Positioning System (GPS) are well known and can lead to degraded or denied position, navigation, and timing capabilities for our warfighters. In addition to intentional disruption, many warfighter missions are also significantly hindered by poor GPS performance, such as Global Navigation Satellite System (GNSS) reception within indoor environments and other occluded situations including urban canyons and mountain terrain. These GNSS solutions are often unavailable in challenging environments simply because the power of the transmitted signals are unable to penetrate obstructions between the satellite sources and the user. It is also well known that GNSS signals can be spoofed using low cost and readily available equipment further leading to corrupted navigation and positioning solutions.
To mitigate the vulnerabilities and performance issues of GPS, Raytheon proposes to blend GNSS and Alternate Navigation (Alt-Nav) signal and sensor sources into a single resilient PNT solution. Raytheon analyzed over 35 Alt-Nav sources by PNT attributes and measurement types, in addition to 25 different satellite-based RF sources. The critical need for the new GPS-embedded Alt-Nav receiver to achieve optimal instantaneous accuracy and to mitigate integrity and spoofing events from untrusted sources is addressed. To meet the critical requirement, Raytheon developed a reinforced machine learning technique to assure the integrity and accuracy of non-traditional sensors.



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