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/1ed1d634-0e86-4803-8e99-1a30abc878e4 MACPEX Date=2026-02-05 User Id=tstevens User Note=updated definition The Mid-Latitude Airborne Cirrus Properties Experiment (MACPEX) is an airborne field campaign that investigated cirrus cloud properties and the processes that affect their impact on radiation. Utilizing the NASA WB-57 based at Ellington Field, TX, the campaign took place from March 18 to April 26, 2011. Science flights focused on central North Marica with an emphasis over the Department of Energy’s Atmospheric Radiation Measurement Program Southern Great Plains (DoE ARM SGP) site in Oklahoma. In addition to the in-situ measurements, flights were coordinated with the NASA EOS / A-Train satellite observations for validation, as well as evaluation of new remote-sensing retrievals for future Earth Science Decadal satellites. The detailed measurements acquired by MACPEX will also be used to improve cloud model parameterizations in Global Climate Models (GCMs). 2026-02-05T12:48:22.831Z