SANTA BARBARA, Calif.–(BUSINESS WIRE)–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® Co