The poster describes the approach of the Green-GEAR project that kicked off in September. Green-GEAR tackles three environmental inefficiencies. First (solution 1), barometric altimetry – used since the early days of aviation – suffers from constant variations in pressure caused by the weather, leading to increased vertical profile variability restricting capacity and flight efficiency in today’s high traffic density. Green-GEAR will thus investigate the environmental potential of geometric altimetry enabled by satellite navigation. Second (solution 2), geometric altimetry is an enabler for the integration of new entrants such as RPAS and HAO aircraft, and its increased accuracy is expected to allow reduction of vertical separation en-route (allowing more aircraft to fly at their optimum altitude), which will be analysed in the project. Finally (solution 3), the project will investigate the potential of new route-charging mechanisms that incentivise miminimum climate impact routing
