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Description

The Level-2G (L2G) Geostationary Earth Orbit (GEO)-Low-Earth Orbit (LEO) Merged Deep Blue Aerosol 0.25 x 0.25-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 as summarized in the following table:

Platform Instrument Temporal Cadence Spatial Res. Product
GOES-16 Advanced Baseline Imager 30 Min. 10 km AERDB_L2_ABI_G16
GOES-17 Advanced Baseline Imager 30 Min. 10 km AERDB_L2_ABI_G17
Himawari-8 Advanced Himawari Imager 30 Min. 10 km AERDB_L2_AHI_H08
GOES-16 Advanced Baseline Imager Daily 1˚ x 1˚ AERDB_D3_ABI_G16
GOES-17 Advanced Baseline Imager Daily 1˚ x 1˚ AERDB_D3_ABI_G17
Himawari-8 Advanced Himawari Imager Daily 1˚ x 1˚ AERDB_D3_AHI_H08
GOES-16 Advanced Baseline Imager Monthly 1˚ x 1˚ AERDB_M3_ABI_G16
GOES-17 Advanced Baseline Imager Monthly 1˚ x 1˚ AERDB_M3_ABI_G17
Himawari-8 Advanced Himawari Imager Monthly 1˚ x 1˚ AERDB_M3_AHI_H08
**Multiple*** **ABI, AHI, VIIRS, MODIS*** 30 Min. 0.25˚ x 0.25˚ AERDB_L2G_GEOLEO_Merged
Multiple* ABI, AHI, VIIRS, MODIS* Daily 1˚ x 1˚ AERDB_D3_GEOLEO_Merged
Multiple* ABI, AHI, VIIRS, MODIS* Monthly 1˚ x 1˚ AERDB_M3_GEOLEO_Merged

* includes G16-ABI, G17-ABI, H08-AHI, SNPP-VIIRS, NOAA20-VIIRS, Terra MODIS & Aqua MODIS

Each L2G GEO-LEO Merged Deep Blue Aerosol product contains gridded Aerosol Optical Thickness (AOT) at 550 nm reference wavelength, derived from seven merged GEO-LEO AOT layers (G16-ABI, G17-ABI, H08-AHI, SNPP-VIIRS, NOAA20-VIIRS, Terra MODIS and Aqua MODIS) and from each of the individual (three GEO and four LEO) instrument sources. Each L2G aggregated datafile is spatially comprised of a 0.25˚ x 0.25˚ horizontal grid that exists for every 30 minutes. This represents a 30-minute Deep Blue best-estimate AOT from each of the seven sources besides an error-weighted merged AOT layer. This first release of these products spans from May 2019 through April 2020 with a potential to generate additional temporal coverage in the future.

Each L2G GEO-LEO Merged datafile contains the following Science Data Sets (SDS):

GEO-LEO Merged Group SDS

  1. Aerosol_Optical_Thickness_550_Count_Land
  2. Aerosol_Optical_Thickness_550_Count_Land_Ocean
  3. Aerosol_Optical_Thickness_550_Count_Ocean
  4. Aerosol_Optical_Thickness_550_Land
  5. Aerosol_Optical_Thickness_550_Land_Ocean
  6. Aerosol_Optical_Thickness_550_Maximum_Land
  7. Aerosol_Optical_Thickness_550_Maximum_Land_Ocean
  8. Aerosol_Optical_Thickness_550_Maximum_Ocean
  9. Aerosol_Optical_Thickness_550_Minimum_Land
  10. Aerosol_Optical_Thickness_550_Minimum_Land_Ocean
  11. Aerosol_Optical_Thickness_550_Minimum_Ocean
  12. Aerosol_Optical_Thickness_550_Ocean
  13. Aerosol_Optical_Thickness_550_Standard_Deviation_Land
  14. Aerosol_Optical_Thickness_550_Standard_Deviation_Land_Ocean
  15. Aerosol_Optical_Thickness_550_Standard_Deviation_Ocean
  16. Solar_Zenith_Angletion

GEO SDSs (G16/ABI, G17/ABI, H08/AHI) & LEO SDSs (T/A: MODIS, SNPP/NOAA-20: VIIRS)

  1. Aerosol_Optical_Thickness_550_Count_Land
  2. Aerosol_Optical_Thickness_550_Count_Land_Ocean
  3. Aerosol_Optical_Thickness_550_Count_Ocean
  4. Aerosol_Optical_Thickness_550_Expected_Uncertainty_Land
  5. Aerosol_Optical_Thickness_550_Expected_Uncertainty_Land_Ocean
  6. Aerosol_Optical_Thickness_550_Expected_Uncertainty_Ocean
  7. Aerosol_Optical_Thickness_550_Land
  8. Aerosol_Optical_Thickness_550_Land_Ocean
  9. Aerosol_Optical_Thickness_550_Ocean
  10. Aerosol_Optical_Thickness_550_Standard_Deviation_Land
  11. Aerosol_Optical_Thickness_550_Standard_Deviation_Land_Ocean
  12. Aerosol_Optical_Thickness_550_Standard_Deviation_Ocean
  13. Relative_Azimuth_Angle
  14. Solar_Zenith_Angle
  15. Viewing_Zenith_Angle

Version Description

Merged L2 product Version 1 Data

Product Summary

Platforms
GOES-16 ,
GOES-17 ,
Himawari-8 ,
Aqua ,
Terra ,
NOAA-20 ,
Suomi-NPP
Instruments
ABI ,
AHI ,
MODIS ,
VIIRS
Projects
GOES ,
Suomi-NPP ,
NOAA - SPACE WEATHER PROGRAM ,
GEO-LEO Deep Blue Aerosol Project
Spatial Extent

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

Spatial Resolution
10 Kilometers x 10 Kilometers
Location
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
C3348093425-LAADS
Data State
COMPLETE
Number of Files/Granules
17568
Processing Level
2G
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 0.25x0.25 degree Gridded L2 [Dataset]. NASA Level 1 and Atmosphere Archive and Distribution System Distributed Active Archive Center. https://doi.org/10.5067/ESROGSS/AERDB_L2G_GEOLEO_MERGED.001 Date Accessed: 2026-08-26

File Naming Convention

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

Example: AERDB_L2G_GEOLEO_Merged.A2020031.0400.001.2024031092933.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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