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/a459c6a0-a895-4661-a286-427068936b5b Air-LUSI Date=2025-08-18 User Id=tstevens User Note=added new project keyword Date=2025-08-18 User Id=system System Note=Added broader relation from Air-LUSI [a459c6a0-a895-4661-a286-427068936b5b] to A - C [0c89f3f4-7ab1-43ce-89ee-795d35f0e30a] The Airborne Lunar Spectral Irradiance (Air-LUSI) is a NASA airborne campaign to measure lunar spectral irradiance at the top of the atmosphere on NASA’s high-altitude ER-2 aircraft. The Air-LUSI instrument was developed through partnership with the National Institute of Standards and Technology (NIST) in collaboration with the University of Maryland Baltimore County, the University of Guelph, and the U.S. Geological Survey (USGS). Air-LUSI operates across the Visible and Near Infrared (VNIR) spectral region (350-1050 nm) with a spectral resolution of 3.7 nm. It provides highly accurate (<1%) measurements of lunar irradiance that are traceable to the International Systems of Units (SI). These measurements help improve uncertainty in lunar irradiance in the exo-atmosphere to establish a lunar calibration model based on the lunar phase and geometry to calibrate satellite observations. 2025-08-18T13:56:46.682Z