Notes
1MOZAIC (Measurement of Ozone and water vapor by Airbus in-service airCraft): measurements 1994–2014; CARIBIC (Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container): 1997-ongoing, entered IAGOS in 2008; IAGOS (In-service Aircraft for a Global Observing System): 2005–ongoing.
2The only other routine commercial aircraft-based programme focusing mainly on long-lived greenhouse gases is CONTRAIL (Comprehensive Observation Network for TRace Gases by AirLiner) operated by a Japanese research and airline consortium.