Array · collection · 2026
VIIRS/SNPP Deep Blue Aerosol L2 6-Min Swath 6 km - V2.1
Listed in NASA Earthdata CMR
Description
The Visible Infrared Imaging Radiometer Suite (VIIRS) NASA standard Level 2 (L2) Deep Blue Aerosol Products from the Suomi National Polar-orbiting Partnership (SNPP) instrument provide satellite-derived measurements of Aerosol Optical Thickness (AOT) and their properties over land and ocean in 6-minute data granules with daily, global coverage. The Deep Blue algorithm draws its heritage from previous applications to retrieve AOT from Sea‐viewing Wide Field‐of‐view Sensor (SeaWiFS) over both land and ocean, and Moderate Resolution Imaging Spectroradiometer (MODIS) measurements over land.
This L2 description pertains to the SNPP VIIRS Deep Blue Aerosol version 2.1 (v2.1) product, whose record starts on March 1, 2012 (2012-061). This orbit-level product (Short-name: AERDB_L2_VIIRS_SNPP) has an at-nadir resolution of 6 km x 6 km and progressively increases away from nadir given the sensor’s scanning geometry and Earth’s curvature. Viewed differently, this product’s resolution accommodates 8 x 8 native VIIRS moderate-resolution (M-band) pixels that nominally have a horizontal pixel size of ~750 m.
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The L2 Deep Blue AOT data products, at 550 nm reference wavelength, are derived from VIIRS bands using two primary AOT retrieval algorithms: the Deep Blue algorithm over land, and the Satellite Ocean Aerosol Retrieval (SOAR) algorithm over ocean. Although this product is called Deep Blue based on retrievals for the land algorithm, the data include over-water retrievals as well. The L2 netCDF product, acquired every 6 minutes, contains 56 Science Data Set (SDS) layers that include the following: 1.
Aerosol_Optical_Thickness_550_Expected_Uncertainty_Land 2. Aerosol_Optical_Thickness_550_Expected_Uncertainty_Ocean 3. Aerosol_Optical_Thickness_550_Land 4.
Aerosol_Optical_Thickness_550_Land_Best_Estimate 5. Aerosol_Optical_Thickness_550_Land_Ocean 6. Aerosol_Optical_Thickness_550_Land_Ocean_Best_Estimate 7.
Aerosol_Optical_Thickness_550_Ocean 8. Aerosol_Optical_Thickness_550_Ocean_Best_Estimate 9. Aerosol_Optical_Thickness_550_STDV_Land 10.
Aerosol_Optical_Thickness_550_STDV_Ocean 11. Aerosol_Optical_Thickness_QA_Flag_Land 12. Aerosol_Optical_Thickness_QA_Flag_Ocean 13.
Aerosol_Type_Land 14. Aerosol_Type_Land_Ocean 15. Aerosol_Type_Ocean 16.
Algorithm_Flag_Land 17. Algorithm_Flag_Ocean 18. Angstrom_Exponent_Land 19.
Angstrom_Exponent_Land_Best_Estimate 20. Angstrom_Exponent_Land_Ocean 21. Angstrom_Exponent_Land_Ocean_Best_Estimate 22.
Angstrom_Exponent_Ocean 23. Angstrom_Exponent_Ocean_Best_Estimate 24. Cell_Average_Elevation_Land 25.
Cell_Average_Elevation_Ocean 26. Fine_Mode_Fraction_550_Ocean 27. Fine_Mode_Fraction_550_Ocean_Best_Estimate 28.
Idx_Atrack 29. Idx_Xtrack 30. Land_Bands 31.
Latitude 32. Longitude 33. NDVI 34.
Number_Of_Pixels_Used_Land 35. Number_Of_Pixels_Used_Ocean 36. Number_Valid_Pixels 37.
Ocean_Bands 38. Ocean_Sum_Squares 39. Precipitable_Water 40.
Reflectance_Bands 41. Relative_Azimuth_Angle 42. Scan_Start_Time 43.
Scattering_Angle 44. Solar_Zenith_Angle 45. Spectral_Aerosol_Optical_Thickness_Land 46.
Spectral_Aerosol_Optical_Thickness_Ocean 47. Spectral_Single_Scattering_Albedo_Land 48. Spectral_Surface_Reflectance 49.
Spectral_TOA_Reflectance_Land 50. Spectral_TOA_Reflectance_Ocean 51. Surface_Pressure 52.
Total_Column_Ozone 53. Unsuitable_Pixel_Fraction_Land_Ocean 54. Viewing_Zenith_Angle 55.
Wind_Direction 56. Wind_Speed Consult the VIIRS Deep Blue Aerosol Product User Guide for additional information regarding the global attributes, data field attributes, SDS names and descriptions, quality flags, software for handling and using these data products, and other relevant information.
Links
Get the data
- search.earthdata.nasa.gov /search/granules?p=C4217896394-LAADS ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- ladsweb.modaps.eosdis.nasa.gov /archive/allData/5201/AERDB_L2_VIIRS_SNPP ↗
Direct access to LAADS archive for AERDB_L2_VIIRS_SNPP data
download · from NASA CMR
- ladsweb.modaps.eosdis.nasa.gov /search/order/2/AERDB_L2_VIIRS_SNPP--5201 ↗
Search for and order data directly from LAADS DAAC with post processing capabilities.
download · from NASA CMR
Where it is published
- Product DOI landing page doi.org/10.5067/viirs/aerdb_l2_viirs_snpp.021 ↗
landing page · DOI / persistent id · from NASA CMR
Documentation and papers
- A link to product ATBD ladsweb.modaps.eosdis.nasa.gov/api/v2/content/archives/Document%20Archive/Science%20Data%20Pr… ↗
documentation · from NASA CMR
- The Deep Blue algorithm deepblue.gsfc.nasa.gov/science ↗
documentation · from NASA CMR
- VIIRS Aerosol User’s Guide ladsweb.modaps.eosdis.nasa.gov/api/v2/content/archives/Document%20Archive/Science%20Data%20Pr… ↗
documentation · from NASA CMR
Catalogue records · 2
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C4217896394-LAADS.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C4217896394-LAADS.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Aerosol Optical Depth/Thickness · Angstrom Exponent · Suomi-NPP · Visible-Infrared Imager-Radiometer Suite
- Inferred from text
- Imaging 75%
Related
- Newer version ofVIIRS/SNPP Deep Blue Aerosol L2 6 Min Swath 6km
Provenance · 1 source records, 13 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C4217896394-LAADS | 6 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:viirs | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/aerosols/aerosol-optical-depth-thickness | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/aerosols/aerosol-optical-depth-thickness/angstrom-exponent | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:imaging | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[platform].gcmd_platform:suomi-npp | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |