10 May 2026 | ZEROGeoengineering.com | NASA’s Langley Research Group (LARGE) conducts in flight experiments to study the evolution of aircraft emissions in the atmosphere.  Some participants include FAA, EPA, Boeing, Air Force, Navy, Rolls Royce, GE Aircraft Engines, and Pratt and Whitney. 

According to their website, the International Civil Aviation Organization (ICAO), a specialized agency of the United Nations (UN), establishes the global standards for aircraft emissions.

“In-flight exhaust-sampling experiments (SNIF, SUCCESS, ACCESS) provide the only means of determining exhaust composition and contrail-ice properties at cruise altitudes. These involve instrumenting an executive-jet class aircraft (Sabreliner or HU-25C Falcon) with an extensive suite of in situ particle and gas sensors, then performed close formation flights in restricted air space to determine emission factors as a function of ambient conditions, engine operation, and fuel composition [e.g., Anderson et al., 1998a; 1998b].”

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