CALIPSO Lidar Level 3 Tropospheric Aerosol Profiles, All Sky Data, Standard V5-00

CAL_LID_L3_Tropospheric_APro_AllSky-Standard-V5-00 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Lidar Level 3 Tropospheric Aerosol, All-Sky, data product. This data product was collected using the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) instrument. This data product, generated separately between day and night, reports monthly mean profiles of aerosol optical properties on a uniform spatial grid. It is a tropospheric product, so data are only reported below altitudes of 12 km. All parameters are derived from the version 5.00 CALIOP Level 2 data and have been quality screened prior to averaging. The primary quantities reported are vertical profiles of the aerosol extinction coefficient at 532 nm and its vertical integral, the aerosol optical depth (AOD). Aerosol type and spatial distributional information are also included. The All-Sky designate indicates that all level 2 columns are averaged, regardless of the occurrence of clouds.

CALIPSO was a partnership between NASA and the French Space Agency, CNES. CALIPSO was launched on April 28, 2006 to study the many roles played by clouds and aerosols in Earth’s climate and weather. It flew in the international A-Train constellation for coincident Earth observations from launch until September 13, 2018, when CALIPSO began lowering its orbit from 705 km to 688 km (428 miles) above the Earth to resume formation flying with CloudSat as part of the “C-Train”. The CALIPSO satellite carried three remote sensing instruments: the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), the Imaging Infrared Radiometer (IIR), and the Wide Field-of-View Camera (WFC). By mutual agreement between NASA and CNES, the CALIPSO science mission concluded on August 1, 2023.

CAL_LID_L3_Tropospheric_APro_AllSky-Standard-V5-00 是云气溶胶激光雷达与红外探测卫星观测（Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation, CALIPSO）的激光雷达三级对流层气溶胶全天空标准V5-00数据产品。该数据产品由正交偏振云气溶胶激光雷达（Cloud-Aerosol Lidar with Orthogonal Polarization, CALIOP）仪器采集。本数据产品分日间与夜间独立生成，报告了均匀空间网格上的气溶胶光学特性月平均廓线。作为对流层专用产品，其数据仅覆盖12千米以下的海拔高度。所有参数均源自5.00版CALIOP二级数据，并在平均处理前经过了质量筛选。报告的核心参数包括532纳米处气溶胶消光系数的垂直廓线及其垂直积分产物——气溶胶光学厚度（Aerosol Optical Depth, AOD）。此外还包含气溶胶类型与空间分布信息。“全天空”标识表明，无论云团是否出现，所有二级数据列均参与平均计算。

CALIPSO 是美国国家航空航天局（National Aeronautics and Space Administration, NASA）与法国国家空间研究中心（Centre National d'Études Spatiales, CNES）的合作项目。CALIPSO卫星于2006年4月28日发射，旨在研究云与气溶胶在地球气候及天气系统中发挥的多种作用。该卫星自发射起便加入国际A-Train星座编队，开展协同地球观测，直至2018年9月13日，CALIPSO开始将轨道高度从705千米降至688千米（约428英里），以恢复与CloudSat的编队飞行，加入“C-Train”编队。CALIPSO卫星搭载了三台遥感仪器：正交偏振云气溶胶激光雷达（CALIOP）、成像红外辐射计（Imaging Infrared Radiometer, IIR）以及宽视场相机（Wide Field-of-View Camera, WFC）。根据美法双方的协议，CALIPSO科学任务于2023年8月1日正式结束。