CALIPSO Lidar Level 3 Tropospheric Aerosol Profiles, All Sky Data, Standard V4-21

CAL_LID_L3_Tropospheric_APro_AllSky-Standard-V4-21 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Lidar Level 3 Tropospheric Aerosol Profiles, All Sky Data, Standard Version 4-21 data product. This data product was collected using the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) instrument. Data collection for this product is complete.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, so data are only reported below altitudes of 12 km. All level 3 parameters are derived from the version 4.21 CALIOP level 2 aerosol profile product and have been quality screened before 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 distribution information are also included. Averaged profile data is reported for all aerosols, regardless of type, and for mineral dust aerosols only. Classification of dust is based on the aerosol-type flags in the level 2 profile product. To keep level 3 file sizes manageable, four different types of level 3 files are 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, and4) Cloud-Sky, Opaque: Only level 2 columns containing opaque clouds are averagedCALIPSO 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).

Data and Resources

Additional Info

Field	Value
Maintainer	Earthdata Forum
Last Updated	August 11, 2025, 19:48 (UTC)
Created	March 20, 2025, 15:05 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	f66e2f34-2861-4125-bbad-23e58d346b38
harvest_source_id	44069cc8-d515-495f-9ea4-b67f76a0a7cb
harvest_source_title	Science Discovery Engine
identifier	10.5067/CALIOP/CALIPSO/CAL_LID_L3_Tropospheric_APro_AllSky-Standard-V4-21_V4-21
landingPage	https://doi.org/10.5067/CALIOP/CALIPSO/CAL_LID_L3_Tropospheric_APro_AllSky-Standard-V4-21_V4-21
modified	2025-02-20
programCode	{026:000}
publisher	NASA/LARC/SD/ASDC
references	{https://asdc.larc.nasa.gov/static/images/project_logos/calipso.png}
resource-type	Dataset
source_datajson_identifier	true
source_hash	fbccdf1cc3ec7edc87f3aefab1b4adcdd33f32654ac96047ef0e0596f7314343
source_schema_version	1.1
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, -0.41 km;12.1 km
temporal	2020-07-01/2020-07-01
theme	{"Earth Science"}