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Imaging · collection · 2022

MODIS/Terra+Aqua Land Aerosol Optical Depth Daily L2G Global 1km SIN Grid V061

Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/modis/mcd19a2.061

The MCD19A2 Version 6.1 data product is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Multi-angle Implementation of Atmospheric Correction (MAIAC) Land Aerosol Optical Depth (AOD) gridded Level 2 product produced daily at 1 kilometer (km) pixel resolution.

Description

The MCD19A2 product provides the atmospheric properties and view geometry used to calculate the MAIAC Land Surface Bidirectional Reflectance Factor (BRF) or surface reflectance, MCD19A1 product.

The MCD19A2 AOD data product contains the following Science Dataset (SDS) layers: blue band AOD at 0.47 µm, green band AOD at 0.55 µm, AOD uncertainty, fine mode fraction over water, column water vapor over land and clouds (in cm), smoke injection height (m above ground), AOD QA, AOD model at 1km, cosine of solar zenith angle, cosine of view zenith angle, relative azimuth angle, scattering angle, and glint angle at 5km.

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A low-resolution browse image is also included showing AOD of the blue band at 0.47 µm created using a composite of all available orbits. Each SDS layer within each MCD19A2 Hierarchical Data Format 4 (HDF4) file contains a third dimension that represents the number of orbit overpasses. This factor could affect the total number of bands for each SDS layer.

Known Issues

* Known issues are described in Section 6 of the User Guide.

  • For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.
  • Users should be aware that they may see a dip in AOD values for the first 5 months of 2022. A fix is planned to be implemented in Collection 7.

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Catalogue records · 3

Topics

Stated by source
Aerosol Optical Depth/Thickness · Earth Observing System, Aqua · Earth Observing System, Terra (AM-1) · Moderate-Resolution Imaging Spectroradiometer
From keywords
Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
Inferred from text
Image 75% · Imaging 75%
Provenance · 2 source records, 20 field assertions
SourceKeyLast seenRaw
NASA Earthdata CMRC2324689816-LPCLOUD14 d agoJSON v1
NASA Data Portale13bec38-5dd6-493d-804d-a49b792d8af712 d agoJSON v1
FieldAssertionExtractorEvidence
access_levelsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[field].local:field:astronomymapping · data nasa govconnector:data_nasa_gov@1.0.0
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concepts[field].local:field:ocean-atmosphericmapping · data nasa govconnector:data_nasa_gov@1.0.0
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concepts[instrument].gcmd_instrument:modissource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/atmosphere/aerosols/aerosol-optical-depth-thicknesssource · NASA CMRconnector:nasa_cmr@1.0.0
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concepts[platform].gcmd_platform:terrasource · NASA CMRconnector:nasa_cmr@1.0.0
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