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/65f63466-cf6b-4f39-adb0-df30533959e8 TOLNet Date=2025-01-08 User Id=sritz Entity=Definition Operation=UPDATE Field=reference System Note=update Definition Old Value=https://www-air.larc.nasa.gov/missions/TOLNet/docs/epjconf_ilrc2016_20001.pdf New Value=https://tolnet.larc.nasa.gov/ Date=2022-06-03 User Id=tstevens Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=TOLNet [65f63466-cf6b-4f39-adb0-df30533959e8,938205] - S - U [4eb1894b-35b4-406b-8864-944a42bc7702,931627] Date=2022-06-03 User Id=tstevens Entity=AltLabel Operation=INSERT System Note=insert AltLabel New Value=id: null category: primary text: Tropospheric Ozone Lidar Network language code: en Date=2022-06-03 User Id=tstevens Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: Ozone lidars measure continuous, high resolution ozone profiles critical for process studies and for satellite validation in the lower troposphere. However, the effectiveness of lidar validation by using single-station data is limited. Recently, NASA initiated an interagency ozone lidar observation network under the name TOLNet to promote cooperative multiple-station ozone-lidar observations to provide highly time resolved (few minutes) tropospheric-ozone vertical profiles useful for air-quality studies, model evaluation, and satellite validation. This article briefly describes the concept, stations, major specifications of the TOLNet instruments, and data archiving. language code: en Date=2025-01-08 User Id=sritz Entity=AltLabel Operation=UPDATE Field=category System Note=update AltLabel Old Value=primary New Value=null Date=2026-02-06 User Id=tstevens User Note=Updated keyword definition Ozone lidars measure continuous, high resolution ozone profiles critical for process studies and for satellite validation in the lower troposphere. However, the effectiveness of lidar validation by using single-station data is limited. Recently, NASA initiated an interagency ozone lidar observation network under the name TOLNet (Tropospheric Ozone Lidar Network) to promote cooperative multiple-station ozone lidar observations to provide highly time resolved (few minutes) tropospheric ozone vertical profiles useful for air quality studies, model evaluation, and satellite validation. 2026-02-06T12:46:29.459Z