Array · collection · 2026
NOAA21 VIIRS Deep Blue Level 3 Daily Aerosol Data, 1x1 Degree Grid V2.1
Listed in NASA Earthdata CMR
Description
The Visible Infrared Imaging Radiometer Suite (VIIRS) NASA standard Level 3 (L3) daily Deep Blue Aerosol Products from the Joint Polar Satellite System (JPSS) series NOAA-21 instrument provide satellite-derived measurements of Aerosol Optical Thickness (AOT) and their properties over land and ocean as gridded aggregates, globally on a daily basis. 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 daily aggregated product (Short-name: AERDB_D3_VIIRS_NOAA21) is derived from the Version 2.1 (v2.1) Level 2 6-minute swath-based products (AERDB_L2_VIIRS_NOAA21) and is provided in a 1 ° x 1 ° horizontal-resolution grid. Each data field, in most cases, represents the arithmetic mean of all the cells whose latitude and longitude coordinates place them within the bounding limits of each grid element. Other measures, like standard deviation, are also provided.
Read the rest (17 more)
This aggregated product is derived using only the best-estimate, QA-filtered retrievals. Using only cells that were measured on the day of interest, the algorithm requires at least three retrieved measurements to render a given grid as valid on any given day. This collection’s daily product record starts on February 10, 2023 (2023-041).
This L3 daily product, in netCDF, contains 45 Science Data Set (SDS) layers that include the following: 1. Aerosol_Optical_Thickness_550_Land_Count 2. Aerosol_Optical_Thickness_550_Land_Maximum 3.
Aerosol_Optical_Thickness_550_Land_Mean 4. Aerosol_Optical_Thickness_550_Land_Minimum 5. Aerosol_Optical_Thickness_550_Land_Ocean_Count 6.
Aerosol_Optical_Thickness_550_Land_Ocean_Maximum 7. Aerosol_Optical_Thickness_550_Land_Ocean_Mean 8. Aerosol_Optical_Thickness_550_Land_Ocean_Minimum 9.
Aerosol_Optical_Thickness_550_Land_Ocean_Standard_Deviation 10. Aerosol_Optical_Thickness_550_Land_Standard_Deviation 11. Aerosol_Optical_Thickness_550_Ocean_Count 12.
Aerosol_Optical_Thickness_550_Ocean_Maximum 13. Aerosol_Optical_Thickness_550_Ocean_Mean 14. Aerosol_Optical_Thickness_550_Ocean_Minimum 15.
Aerosol_Optical_Thickness_550_Ocean_Standard_Deviation 16. Aerosol_Type_Land_Ocean_Histogram 17. Aerosol_Type_Land_Ocean_Mode 18.
Aerosol_Types 19. Angstrom_Exponent_Land_Maximum 20. Angstrom_Exponent_Land_Mean 21.
Angstrom_Exponent_Land_Minimum 22. Angstrom_Exponent_Land_Ocean_Maximum 23. Angstrom_Exponent_Land_Ocean_Mean 24.
Angstrom_Exponent_Land_Ocean_Minimum 25. Angstrom_Exponent_Land_Ocean_Standard_Deviation 26. Angstrom_Exponent_Land_Standard_Deviation 27.
Angstrom_Exponent_Ocean_Maximum 28. Angstrom_Exponent_Ocean_Mean 29. Angstrom_Exponent_Ocean_Minimum 30.
Angstrom_Exponent_Ocean_Standard_Deviation 31. Fine_Mode_Fraction_550_Ocean_Mean 32. Fine_Mode_Fraction_550_Ocean_Standard_Deviation 33.
Land_Bands 34. Latitude 35. Latitude_1D 36.
Longitude 37. Longitude_1D 38. Ocean_Bands 39.
Spectral_Aerosol_Optical_Thickness_Land_Count 40. Spectral_Aerosol_Optical_Thickness_Land_Mean 41. Spectral_Aerosol_Optical_Thickness_Land_Standard_Deviation 42.
Spectral_Aerosol_Optical_Thickness_Ocean_Count 43. Spectral_Aerosol_Optical_Thickness_Ocean_Mean 44. Spectral_Aerosol_Optical_Thickness_Ocean_Standard_Deviation 45.
Unsuitable_Pixel_Fraction_Land_Ocean 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
- ladsweb.modaps.eosdis.nasa.gov /archive/allData/5201/AERDB_D3_VIIRS_NOAA21 ↗
Direct access to LAADS archive for AERDB_D3_VIIRS_NOAA21 data
download · from NASA CMR
- search.earthdata.nasa.gov /search/granules?p=C4224077532-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 /search/order/1/AERDB_D3_VIIRS_NOAA21--5201 ↗
Search for and order data directly from LAADS DAAC with post processing capabilities.
download · from NASA CMR
Where it is published
- DOI doi.org/10.5067/viirs/aerdb_d3_viirs_noaa21.021 ↗
DOI / persistent id · from NASA CMR
Documentation and papers
- SNPP VIIRS Deep Blue Aerosol Product ATBD ladsweb.modaps.eosdis.nasa.gov/api/v2/content/archives/Document%20Archive/Science%20Data%20Pr… ↗
documentation · from NASA CMR
- Data product documentation deepblue.gsfc.nasa.gov/publications ↗
documentation · from NASA CMR
- VIIRS Deep Blue Aerosol User Guide V2.1 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/C4224077532-LAADS.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C4224077532-LAADS.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Aerosol Optical Depth/Thickness · Angstrom Exponent · Joint Polar Satellite System - 2 · Visible-Infrared Imager-Radiometer Suite
- Inferred from text
- Atmospheric sciences 75% · Imaging 75%
Provenance · 1 source records, 15 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C4224077532-LAADS | 6 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3701 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (75%) |
| 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:noaa-21 | 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 |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| 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 |