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Session C8: Military GPS User Equipment and Related Programs 3

MCNAV: Path to Alternative PNT in R-EGI
IS4S: Natasha Norris, Matthew Smearcheck, Joseph Rufo, Ken Fisher, USAF AFLCMC/ESC: Michael Switzer, Daniel Gelter
Location: Ballroom B
Date/Time: Tuesday, Jun. 2, 4:45 p.m.

The Resilient - Embedded Global Positioning System (GPS) and Integrated Navigation System (INS) - (R-EGI) Program is an open, modular, pluggable Position, Navigation, and Timing (PNT) system designed to enable rapid integrity and alternative PNT insertion for airborne platforms. R-EGI leverages many open and industry standards as part of the program to achieve the ambitious modular open system approach (MOSA) goals, including FACE, ASPN, pntOS, OMS, and VPX.
R-EGI is currently working integration efforts with two USAF aircraft program offices, with three USAF platform funded study efforts intended to identify adaptations required for R-EGI integration on their aircraft. Currently, R-EGI Production Representative Units (PRU) are exercised incrementally in the lead program’s System Integration Lab (SIL) with full capability targeted for Q3 CY26. The R-EGI consists of five major components: Safety Critical Navigation subsystem (SCNAV), Global Navigation Satellite System Receiver (GNSSR), Inertial Measurement Unit (IMU), Chassis Subsystem, and Mission Capability Navigation subsystem (MCNAV). MCNAV provides the “Resilient” Navigation and Precision Time capabilities for the R-EGI and host platform.
The MCNAV subsystem will make use of Alternative PNT methods with any available non-GPS sensor measurements to augment GNSS-based navigation and timing approaches. A key objective and requirement of the R-EGI program is to maintain the MCNAV card and the software within it open and available to be rapidly updated. The modular design of R-EGI functionally and physically separates the safety critical and mission functions of the PNT system to reduce the impact of resilient PNT insertion for mission capabilities and minimizes the lengthy and expensive burden of airworthiness certification when modifying navigation systems that support safety critical functions. The PNT Program Office seeks to leverage investments and developments in alternative PNT from a wide range of sources to provide cutting-edge resilient PNT. The primary mechanism by which MCNAV capabilities will be expanded is through the pntOS API in coordination with the ASPN 2023 data model. This presentation highlights how to rapidly integrate new sensors into MCNAV with a walkthrough demonstrating the options and level of effort required.

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