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The grant program focuses on the development of fuel injector design concepts for supersonic aircraft, aiming to achieve low nitrogen oxide (NOx) emissions during supersonic cruise and meet acceptable levels of NOx emissions during landing and take-off. The initiative is looking to integrate these advances into supersonic aircraft projected for service entry around 2035 or later. This effort is part of NASA's broader commitment to innovating commercial high-speed aircraft, aligning with their strategic thrust on enhancing commercial supersonic technology as detailed in their Aeronautics Strategic Implementation Plan.