https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf draft 2025-07-25 https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/projects/b960097c-f050-4d34-af06-517dc49b6e4e AJAX Date=2020-09-22 User Id=sritz Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=AJAX [b960097c-f050-4d34-af06-517dc49b6e4e,560710] - A - C [0c89f3f4-7ab1-43ce-89ee-795d35f0e30a,546613] Date=2020-09-22 User Id=sritz Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: The NASA Ames Research Center operates a new research platform for atmospheric studies: an instrumented Alpha Jet. The present complement of instruments allows for the determination of carbon dioxide, ozone, water vapor, and methane concentrations as well as measurements of three-dimensional wind speeds, temperature, and pressure. Planned future instrumentation includes an Air-Core sampler and an instrument to measure formaldehyde. We give examples of measurements that have been made, including measurements carried out during a downward spiral over an expected methane source. An attractive property of this airborne system is its ability to respond rapidly to unexpected atmospheric events such as large forest fires or severe air quality events. language code: en Date=2020-09-22 User Id=sritz Entity=AltLabel Operation=INSERT System Note=insert AltLabel New Value=id: null category: primary text: Alpha Jet Atmospheric eXperiment language code: en Date=2026-02-05 User Id=tstevens User Note=updated definition The NASA Ames Research Center operated a new research platform for atmospheric studies, an instrumented Alpha Jet. The complement of instruments allowed for the determination of carbon dioxide, ozone, water vapor, and methane concentrations as well as measurements of three-dimensional wind speeds, temperature, and pressure. The Alpha Jet Atmospheric eXperiment (AJAX) was a long-term partnership between NASA's Ames Research Center and H211, L.L.C., facilitating routine in-situ measurements over California, Nevada, and the coastal Pacific in support of satellite validation. AJAX supported NASA's Orbiting Carbon Observatory (OCO-2/3) and Japan's GOSAT and GOSAT-2 and collaborated with many other research organizations (e.g. CARB, NOAA, USFS, EPA). AJAX celebrated its 200th science flight in 2016, and studies have investigated topics as varied as stratospheric-to-tropospheric transport, forest fire plumes, atmospheric river events, long-range transport of pollution from Asia to the western US, urban outflow, and emissions from gas leaks, oil fields, and dairies. 2026-02-05T13:29:17.749Z