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/e0a48b3c-ab3d-4331-b992-367352d5c09c ACEPOL Date=2020-01-09 User Id=sritz Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: The Aerosol Characterization from Polarimeter and Lidar (ACEPOL) campaignExternal Link ... will perform aerosol and cloud measurements over the USA from the NASA high altitude ER-2 aircraft using measurements from four spectro/photo polarimeters (RSP, AirMSPI, AirHARP, and AirSPEX) which differ in terms of spectral, angular, and spatial sampling. The measurements from these passive sensors will be complemented by measurements from active sensors (airborne HSRL-2 and CPL lidars). language code: en Date=2020-01-09 User Id=sritz Entity=AltLabel Operation=INSERT System Note=insert AltLabel New Value=id: null category: primary text: Aerosol Characterization from Polarimeter and Lidar language code: en Date=2020-01-09 User Id=sritz Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=ACEPOL [e0a48b3c-ab3d-4331-b992-367352d5c09c,559621] - A - C [0c89f3f4-7ab1-43ce-89ee-795d35f0e30a,546613] Date=2020-01-09 User Id=sritz Entity=Definition Operation=UPDATE Field=text System Note=update Definition Old Value=The Aerosol Characterization from Polarimeter and Lidar (ACEPOL) campaignExternal Link ... will perform aerosol and cloud measurements over the USA from the NASA high altitude ER-2 aircraft using measurements from four spectro/photo polarimeters (RSP, AirMSPI, AirHARP, and AirSPEX) which differ in terms of spectral, angular, and spatial sampling. The measurements from these passive sensors will be complemented by measurements from active sensors (airborne HSRL-2 and CPL lidars). New Value=The Aerosol Characterization from Polarimeter and Lidar (ACEPOL) campaignExternal Link ... will perform aerosol and cloud measurements over the USA from the NASA high altitude ER-2 aircraft using measurements from four spectro/photo polarimeters (RSP, AirMSPI, AirHARP, and AirSPEX) which differ in terms of spectral, angular, and spatial sampling. The measurements from these passive sensors will be complemented by measurements from active sensors (airborne HSRL-2 and CPL lidars). Additional Information: https://www-air.larc.nasa.gov/missions/acepol/ The Aerosol Characterization from Polarimeter and Lidar (ACEPOL) campaign performed aerosol and cloud measurements over the USA from the NASA high altitude ER-2 aircraft using measurements from four spectro/photo polarimeters (RSP, AirMSPI, AirHARP, and AirSPEX) which differ in terms of spectral, angular, and spatial sampling. The measurements from these passive sensors were complemented by measurements from active sensors (airborne HSRL-2 and CPL lidars). 2026-02-05T15:03:50.466Z