News & Press
Advanced Airborne Positioning, Navigation, and Timing (PNT) Solution Depends on Proven Multicore RTOS for Safety Certification to DO-178C
SANTA BARBARA, Calif. — April 28, 2026 — Green Hills Software today announced that its INTEGRITY®-178 tuMP™ real-time operating system (RTOS) is part of Northrop Grumman's delivery of the first production unit of its LN-351 Embedded Global Positioning System (GPS)/Inertial Navigation System (INS)-Modernization (EGI-M) solution. EGI-M incorporates an M-Code capable receiver and enables operation in GPS-constrained or GPS-denied environments. The INTEGRITY-178 tuMP RTOS runs on a quad-core ARM® Cortex®-A53 CPU. Key factors in the selection of INTEGRITY-178 tuMP included built-in DAL-A functionality and tools for mitigating multicore interference per AC 20-193 (formerly CAST-32A), a proven Multiple Independent Levels of Security (MILS) service history and security certification pedigree, and certified conformance to the FACE® 3.0 Technical Standard.
“Green Hills Software is proud to support Northrop Grumman on the EGI-M program for their safety and security requirements,” said Dan O'Dowd, founder and chief executive officer of Green Hills Software. “The INTEGRITY-178 tuMP RTOS has a unique combination of safety and security in a single MOSA product. Designed from the beginning to be a multicore RTOS, INTEGRITY-178 tuMP is the only FACE conformant RTOS that has the ability to run a DAL-A partition across multiple cores and mitigate all sources of multicore interference per AC 20-193."
The EGI-M system has an open model-based, partitioned software architecture meeting DO-178C objectives and DO-254 firmware certifiability. The system enables rapid response to emerging threats via a Common Application Space (CAS) that uses a Future Airborne Capabilities Environment® interface as a host for 3rd party applications without Northrop Grumman involvement to tailor navigation functions. EGI-M's launch platforms are the E-2D Advanced Hawkeye and the F-22 Raptor.
The INTEGRITY-178 tuMP high-assurance RTOS from Green Hills Software is uniquely designed to meet both DO-178C DAL A airborne safety objectives and the strictest security requirements. In 2021, the INTEGRITY-178 tuMP safety-critical RTOS from Green Hills Software became the first operating system to be part of a successful multicore certification to DO-178C DAL A and CAST-32A and AC 20-193 objectives. INTEGRITY-178 tuMP was the first
RTOS to be certified conformant to a version of the FACE Technical Standard that addressed multicore requirements, which is edition 3.0. INTEGRITY-178 tuMP is the only RTOS with multicore interference mitigation for all shared processor resources, enabling the system integrator to meet AC 20-193 objectives with robust partitioning. Robust partitioning is a prerequisite for a full implementation of integrated modular avionics (IMA) or being able to reuse an application component without complete retesting and reverification of the entire system. The INTEGRITY-178 tuMP RTOS is also a MILS operating system that has been deployed on numerous cross domain solutions (CDS) and multi-level security (MLS) programs. Green Hills Software led the way to meeting CDS requirements for an operating system by getting INTEGRITY-178 certified to Common Criteria EAL 6+ and “High Robustness.” INTEGRITY-178 tuMP is the only RTOS to be part of a certification to NSA's “Raise the Bar” CDS security standard.
About Green Hills Software Founded in 1982, Green Hills Software is the worldwide leader in embedded safety and security. In 2008, the Green Hills INTEGRITY-178 RTOS was the first and only operating system to be certified by NIAP (National Information Assurance Partnership comprised of NSA & NIST)to EAL 6+, High Robustness, the highest level of security ever achieved for any software product. Our open architecture integrated development solutions address deeply embedded, absolute security and high-reliability applications for the military/avionics, medical, industrial, automotive, networking, consumer and other markets that demand industry-certified solutions. Green Hills Software is headquartered in Santa Barbara, CA, with European headquarters in the United Kingdom. Visit Green Hills Software at https://www.ghs.com.
North American Sales Contact: Green Hills Software 30 West Sola Street, Santa Barbara, CA 93101 Tel: 805-965-6044 Fax: 805-965-6343 Website: www.ghs.com Email: info@ghs.com
Safety and Security Critical Products: Green Hills Software 34125 US Hwy 19 North, Suite 100 Palm Harbor, FL 34684 Tel: 727-781-4909 Fax: 727-781-3915 Email:info-sscp@ghs.com
Media Contact: Green Hills Software Christopher Smith Tel: 805-965-6044 Email: media@ghs.com
