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MODIS/Aqua Aerosol 5-Min L2 Swath 3km - NRT

Metadata Updated: December 7, 2023

The new Collection 6.1 (C61) MYD04_3K product is an improved version based on algorithm changes in Dark Target (DT) Aerosol retrieval over urban areas and uncertainty estimates for Deep Blue (DB) Aerosol retrievals.

The MODIS level-2 atmospheric aerosol product provides retrieved ambient aerosol optical properties, quality assurance, and other parameters, globally over ocean and land. In Collection 5, and earlier collections, there was only one aerosol product (MOD04_L2) at 10km (at nadir) spatial resolution. Starting from C6, the Dark Target (DT) Aerosol algorithm team provided a new 3 km spatial resolution product (MOD04_3k) intended for the air quality community.

The MOD04_3K product is based on the same algorithm and Look up Tables as the standard Dark Target aerosol product. Because of finer resolution, subtle differences are made in selecting pixels for retrieval and in determining QA. The only differences between the existing 10km algorithm and the 3km algorithm are: 1) the size of the pixel-arrays defining each retrieval box (6x6 retrieval boxes of 36 pixels at 0.5km resolution for 3km algorithm as oppose to 20x20 retrieval boxes of 400 pixels at 0.5km resolution for 10km product); 2) the minimum percentage of good pixels required for a retrieval (a minimum of 5 pixels over ocean and 6 pixels over land instead of a minimum of 10 pixels over ocean or 12 pixels over land for 10km product retrieval); 3) the 10km algorithm attempts a poor quality retrieval while 3km algorithm does not. Everything else is same in two products.

For more information on C6.1 changes and updates, visit the MODIS Atmosphere website at:

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023
Identifier C1426717545-LANCEMODIS
Data First Published 2017-10-12
Language en-US
Data Last Modified 2023-07-20
Category DODS, EOSDIS, ESIP, AQUA, OPENDAP, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation LANCEMODIS. 2017-10-20. MODIS/Aqua Aerosol 5-Min L2 Swath 3km. Version 6.1NRT. MODAPS at NASA/GSFC. Archived by National Aeronautics and Space Administration, U.S. Government, The Land, Atmosphere Near real-time Capability for EOS (LANCE).
Harvest Object Id b72047c7-b15d-42d0-b90b-6dbebe06433d
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Release Place MODAPS at NASA/GSFC
Source Datajson Identifier True
Source Hash 14cbc626c15737c442deaf841a8eb5b160de4fed1f3d5c02e7b169ba3409660b
Source Schema Version 1.1
Temporal 2017-10-20T00:00:00Z/2023-07-24T00:00:00Z

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