International Space Station end-to-end GN&C integration and development testing

To address some of the risks associated with the early integration and testing of the International Space Station (ISS) Guidance, Navigation, and Control (GN&C) system, the GN&C Integration Test Facility (GITF) at JSC was developed. The GITF is the only facility in the world capable of functional integration and end-to-end hardware in the loop testing of U.S. and Russian GN&C hardware and software, including their interfaces with the command and control (C&C) system. This paper elaborates on facility architecture and design decisions, testing phases, challenges,and potential future applications of GITF