To develop and demonstrate non-intrusive measurement and 2D tomography of nvPM/soot and CO2 concentrations in aero-engine exhaust. Validation of the technology will require measurement of representative lean burn combustion emissions conditions and supporting data analysis including relevant measurement uncertainty confirmation. System level validation will require the supply of a robust hardware and analysis system for whole engine demonstrators. The measurement system should be developed to a maturity level of TRL6 with a route to commercialisation. Please refer to the full and formal topic descriptions published in this call.