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/ba011141-ed7a-4ef5-890d-09776eed9b49 PACE-PAX Date=2024-05-06 User Id=tstevens Entity=AltLabel Operation=INSERT System Note=insert AltLabel New Value=id: null category: primary text: Plankton, Aerosol, Cloud, ocean Ecosystem Postlaunch Airborne eXperiment language code: en Date=2024-05-06 User Id=tstevens Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: The Plankton, Aerosol, Cloud, ocean Ecosystem Postlaunch Airborne eXperiment (PACE-PAX) will be a field campaign to gather data for the validation of the upcoming PACE mission. PACE-PAX will be conducted in September, 2024, roughly nine months after the launch of PACE. The operational area will be Southern and Central California and nearby coastal regions. Sixty flight hours are planned each for the NASA ER-2 and the CIRPAS Twin Otter. Both will be based in their home airports at NASA Armstrong Flight Research Center and Marina Municipal Airport, respectively. Flights will be coordinated between the aircraft, with PACE overflights, and with surface based observations including ship-based measurements and floats. Data will be made available within six months following the conclusion of the campaign. language code: en Date=2024-05-06 User Id=tstevens Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=PACE-PAX [ba011141-ed7a-4ef5-890d-09776eed9b49,1678721] - P - R [6e0ee015-7fde-40bf-af5a-5b95ad966e32,1672087] Date=2026-02-05 User Id=tstevens User Note=updated definition The Plankton, Aerosol, Cloud, ocean Ecosystem Postlaunch Airborne eXperiment (PACE-PAX) is a field campaign that gathered data for the validation of the PACE mission. PACE-PAX was conducted in September 2024, roughly nine months after the launch of PACE. The operational area was Southern and Central California and nearby coastal regions. Sixty flight hours were conducted by the NASA ER-2 and the CIRPAS Twin Otter. Both were based in their home airports at NASA Armstrong Flight Research Center and Marina Municipal Airport, respectively. Flights were coordinated between the aircraft, with PACE overflights, and with surface-based observations including ship-based measurements and floats. 2026-02-05T12:51:48.806Z