International Space Systems Inc (ISSI) is a System's Engineering and Software Engineering company. ISSI provides services in Systems Engineering, Advanced Launch Vehicles and Concept Analysis, Propulsion Performance and Analysis, Trajectory Performance and Analysis, Hypersonic Aerodynamics, Mission Planing Analysis and Integration, Mission and Flight Operations, Structures and Dynamics, Thermal Analysis, Cost Modeling, Safety and Reliability Analysis, Configuration Management, and Multi-Discipline Engineering.Current ISSI research includes activities in NASA's Intelligent Synthesis Environment/Collaborative Engineering Environment (ISE/CEE) through our product called RECIPEĀ©, advanced launch vehicle analysis for Rocket-based Combined-Cycle (RBCC) and Nuclear Airbreathing Rockets (NAR) concepts, and advanced web-based applictions. Plus we have academic partnerships with leading universities active in current space technology research