WORK-PACKAGES WP1 Contrail Ice Nucleation in the Low Soot Regime More about WP1 WP2 In-Flight Measurements of Aircraft Aerosol Effects on High and Low Clouds More about WP2 WP3 Operational Airline Demonstration Flights for Contrail Avoidance More about WP3 WP4 Climate Optimized Flight Routes: Predictability and Costs More about WP4 WP5 Synthesis, Impact and Outreach More about WP5 WP6 Project Management and Coordination More about WP6