Northrop Grumman has tapped Green Hills Software’s real-time operating system for its latest GPS-modernized navigation system for US military aircraft.
Northrop integrated Green Hills’ INTEGRITY-178 tuMP system into its LN-351 Embedded GPS/Inertial Navigation System-Modernization (EGI-M), marking the first production delivery of the upgraded system.
EGI-M combines inertial navigation with an M-Code-capable GPS receiver intended to keep aircraft positioned and operational even when satellite signals are degraded or disrupted.
Green Hills’ software runs on a quad-core ARM Cortex-A53 processor and was chosen for its safety and security certifications.
The system uses a partitioned architecture that allows multiple applications to run in isolation on the same hardware. That design enables faster software updates and easier integration of third-party applications through a shared mission environment.
Initial deployment includes the E-2D Advanced Hawkeye and the F-22 Raptor.
Northrop’s EGI-M
Northrop has been advancing the EGI-M program as part of a broader US effort to strengthen navigation systems against electronic warfare threats.
In April, the company delivered the first production unit and is expected to transition towards full-rate manufacturing.
The delivery followed successful trials of the system as early as 2023.
Lt. Col. Chris Grover of the US Air Force said that the “advanced, resilient PNT receiver allows our US military assets the ability to go where we want to, with the capability we need, at the time of our choosing.”
