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CALIPSO Lidar Level 2 5 km Aerosol Layer Data, V4-21

Published by NASA/LARC/SD/ASDC | National Aeronautics and Space Administration | Catalog Last Checked: May 18, 2026 at 03:49 PM | Dataset Last Updated: May 11, 2026
CAL_LID_L2_05kmALay-Standard-V4-21 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Lidar Level 2 5 km Aerosol Layer Data, Version 4-21 data product. This data product was collected using the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) instrument. The version of this product was changed from 4-20 to 4-21 to account for a change in the operating system of the CALIPSO production cluster. Data collection for this product is complete. Within the Lidar Aerosol Layer Product, there are two general classes of data:- Column Properties (including position data and viewing geometry) and Layer Properties. The lidar layer products consist of a sequence of column descriptors, each associated with a variable number of layer descriptors. The column descriptors specify the temporal and geophysical location of the column of the atmosphere through which a given lidar pulse travels. Also included in the column descriptors are indicators of surface lighting conditions, information about the surface type, and the number of features (e.g., aerosol layers) identified within the column. CALIPSO was launched on April 28, 2006, and continues to collect data necessary to study the impact of clouds and aerosols on the Earth's radiation budget and climate. It flies in the international A-Train constellation for coincident Earth observations. The CALIPSO satellite comprises three instruments: CALIOP, Imaging Infrared Radiometer (IIR), and Wide Field Camera (WFC). CALIPSO is a joint satellite mission between NASA and the French Agency CNES (Centre national d'études spatiales).

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Complete Metadata
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description CAL_LID_L2_05kmALay-Standard-V4-21 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Lidar Level 2 5 km Aerosol Layer Data, Version 4-21 data product. This data product was collected using the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) instrument. The version of this product was changed from 4-20 to 4-21 to account for a change in the operating system of the CALIPSO production cluster. Data collection for this product is complete. Within the Lidar Aerosol Layer Product, there are two general classes of data:- Column Properties (including position data and viewing geometry) and Layer Properties. The lidar layer products consist of a sequence of column descriptors, each associated with a variable number of layer descriptors. The column descriptors specify the temporal and geophysical location of the column of the atmosphere through which a given lidar pulse travels. Also included in the column descriptors are indicators of surface lighting conditions, information about the surface type, and the number of features (e.g., aerosol layers) identified within the column. CALIPSO was launched on April 28, 2006, and continues to collect data necessary to study the impact of clouds and aerosols on the Earth's radiation budget and climate. It flies in the international A-Train constellation for coincident Earth observations. The CALIPSO satellite comprises three instruments: CALIOP, Imaging Infrared Radiometer (IIR), and Wide Field Camera (WFC). CALIPSO is a joint satellite mission between NASA and the French Agency CNES (Centre national d'études spatiales).
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identifier 10.5067/CALIOP/CALIPSO/CAL_LID_L2_05kmALay-Standard-V4-21
keyword 
                                            [
  "earth-science-aerosols-atmosphere",
  "earth-science-aerosols-atmosphere-aerosol-backscatter",
  "earth-science-aerosols-atmosphere-aerosol-optical-depth-thickness",
  "earth-science-atmospheric-water-vapor-atmosphere-water-vapor-indicators-humidity-relative-humid",
  "earth-science-lidar-spectral-engineering"
]
license https://www.usa.gov/government-works
modified 2026-05-11
programCode 
                                            [
  "026:000"
]
publisher 
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spatial ["CARTESIAN",[{"Boundary":{"Points":[{"Latitude":-90,"Longitude":-180},{"Latitude":-90,"Longitude":180},{"Latitude":90,"Longitude":180},{"Latitude":90,"Longitude":-180},{"Latitude":-90,"Longitude":-180}]}}]], Minimum Altitude;Maximum Altitude, -1.8183749 km;39.79567 km
temporal 2020-07-01/2022-01-19
theme 
                                            [
  "Earth Science"
]
title CALIPSO Lidar Level 2 5 km Aerosol Layer Data, V4-21

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