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CALIPSO Lidar Level 3 Tropospheric Aerosol Profiles, Cloud Free Data, Standard V4-20

Metadata Updated: December 7, 2023

CAL_LID_L3_Tropospheric_APro_CloudFree-Standard-V4-20 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Lidar Level 3 Tropospheric Aerosol Profiles, Cloud Free Data, Standard Version 4-20 data product. This data product was collected using the Cloud-Aerosol LIdar with Orthogonal Polarization (CALIOP) instrument. Data collection for this product is ongoing.

The CALIPSO lidar level 3 aerosol data product reports monthly mean profiles of aerosol optical properties on a uniform spatial grid. It is intended to be a tropospheric product and so data are only reported below altitudes of 12 km. All level 3 parameters are derived from the version 4.20 CALIOP level 2 aerosol profile product and have been quality screened prior to averaging. The primary quantities reported are vertical profiles of aerosol extinction coefficient at 532nm and its vertical integral, the aerosol optical depth (AOD). Aerosol type and spatial distribution information are also included. Averaged profile data is reported for all aerosols, regardless of type, and for mineral dust aerosol only. Classification of dust is based on the aerosol type flags in the level 2 profile product. To keep level 3 file sizes manageable, there are four different types of level 3 files produced, depending on the sky condition and the temporal coverage of the data prior to averaging.

Description of the Four Sky Conditions (Day, Night) 1) All Sky: All level 2 columns are averaged, regardless of cloud occurrence 2) Cloud-Free: Only cloud-free level 2 columns are averaged 3) Cloudy-Sky, Transparent: Only level 2 columns containing transparent clouds are averaged 4) Cloud-Sky, Opaque: Only level 2 columns containing opaque clouds are averaged

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.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023

Metadata Source

Harvested from NASA Data.json

Graphic Preview

CALIPSO Lidar Browse Images (Production - Standard - Science Ready)

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023
Identifier C1633036565-LARC_ASDC
Data First Published 2019-07-18
Language en-US
Data Last Modified 2019-07-18
Category CALIPSO, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation 2019-09-11. Archived by National Aeronautics and Space Administration, U.S. Government, NASA/LARC/SD/ASDC.
Graphic Preview Description CALIPSO Lidar Browse Images (Production - Standard - Science Ready)
Graphic Preview File
Harvest Object Id fb9b2675-0e62-439e-994d-d0e82c2cdcdf
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -85.0 180.0 85.0
Program Code 026:001
Source Datajson Identifier True
Source Hash fddd69a6b4360787ba99548ee253229d2ab009a67e77db751bb68b8a2c8f1768
Source Schema Version 1.1
Temporal 2006-06-01T00:00:00Z/2022-01-17T00:00:00Z

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