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Description

The GEO-LEO Merged Deep Blue Aerosol Monthly 1 x 1 degree Gridded L3 product, short-name AERDB_M3_GEOLEO_Merged contains gridded Aerosol Optical Thickness (AOT) at 550 nm reference wavelength that are composited from the L3 daily product (AERDB_D3_GEOLEO_Merged). Please note that while the individual standalone gridded data layer for each instrument is calculated as the arithmetic mean, the merged AOT layer is derived via an error-weighted average approach. The final retrievals used in the aggregation process are QA-filtered best-estimate values for cells that are measured on the day of interest. Further, at least three such retrievals are required to render the validity of a grid cell on any given day. Each L3 daily aggregated datafile is spatially comprised of a 1˚ x 1˚ horizontal grid that exists for every 30 minutes. This first release of these products spans from May 2019 through April 2020 with a potential to generate additional temporal coverage in the future.

The Level-3 (L3) Geostationary Earth Orbit (GEO)-Low-Earth Orbit (LEO) Merged Deep Blue Aerosol Daily 1 x 1-degree Gridded dataset is part of a 12-product suite produced by an Earth Science Research from Operational Geostationary Satellite Systems (ESROGSS)-funded project. The 12 products in this project include nine derived from three Geostationary Earth Observation (GEO) instruments and three from merged data from GEO and Low-Earth Orbit (LEO) instruments.

The AERDB_M3_GEOLEO_Merged product, in netCDF4 format, contains 16 GEO-LEO Merged Group Science Data Set (SDS) layers and 15 GEO and LEO SDS layers.

For more information consult LAADS product description page at:

https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/AERDB_M3_GEOLEO_Merged

Or, Deep Blue aerosol project webpage at:
https://earth.gsfc.nasa.gov/climate/data/deep-blue

Version Description

Merged L3 product Version 1 Data

Product Summary

Platforms
GOES-16 ,
GOES-17 ,
Himawari-8 ,
Aqua ,
Terra ,
NOAA-20 ,
Suomi-NPP
Instruments
ABI ,
AHI ,
MODIS ,
VIIRS
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
10 Kilometers x 10 Kilometers
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2019-05-01 to 2020-05-01
Data Partner
L1 and Atmosphere Archive and Distribution System,Biospheric Information Systems Branch, Hydrospheric and Biospheric Sciences Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/H ,
Atmosphere Science Investigator-led Processing System, Space Science and Engineering Center, University of Wisconsin-Madison (UWI-MAD/SSEC/ASIPS)
Concept ID
C3348069018-LAADS
Data State
ACTIVE
Number of Files/Granules
12
Processing Level
3
Published
Science Keywords
Aerosol Optical Depth/Thickness ,
Angstrom Exponent ,
Aerosols ,
Aerosol Particle Properties

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Team, D. B. A. A. S. (2024). GEO-LEO Merged Deep Blue Aerosol Monthly 1x1 degree Gridded L3 [Data set]. NASA Level 1 and Atmosphere Archive and Distribution System Distributed Active Archive Center. https://doi.org/10.5067/ESROGSS/AERDB_M3_GEOLEO_MERGED.001 Date Accessed: 2025-12-14

File Naming Convention

Syntax: ESDT.AYYYYDDD.HHMM.CCC.YYYYDDDHHMMSS.Format

Example: AERDB_M3_GEOLEO_Merged.A2020092.001.2024092025246.nc


ESDT: Earth Science Data Type or short name

A: Stands for Acquisition

YYYYDDD: Data acquisition year and day-of-year

HHMM: Acquisition hour and minute

CCC: Version ID of the data collection

YYYYDDDHHMMSS: Processing year, day-of-year, UTC time (hour, minutes, seconds)

Format: File format suffix, which in the above case represents netCDF4

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