MCD19A3 v006

MODIS/Terra+Aqua MAIAC BRDF Model Parameters 8-Day L3 Global 1 km SIN Grid


PI: Alexei Lyapustin

Description

The MCD19A3 Version 6 data product is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Multi-angle Implementation of Atmospheric Correction (MAIAC) Bidirectional Reflectance Distribution Function (BRDF) Model Parameters gridded Level 3 product which is output every 8 days at 1 kilometer resolution. The MCD19A3 product provides three coefficients (weights) of the RossThick/Li-Sparse (RTLS) BRDF model that can be used to describe the anisotropy of each pixel. The retrievals represent cloud-free and low aerosol conditions.

The MCD19A3 BRDF Model Parameters product contains the following Science Dataset (SDS) layers: RTLS isotropic kernel parameter (Kiso) for bands 1-8, the RTLS volumetric kernel parameter (Kvol) for bands 1-8, RTLS geometric kernel parameter (Kgeo) for bands 1-8, surface albedo for bands 1-8, and the number of days since last update to current day. Three low-resolution browse images are also included showing the BRDF coefficients for the red band: (1) Kiso, (2) Kvol, and (3) Kgeo.

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Characteristics

Improvements/Changes from Previous Versions

No previous versions.

Product Maturity

Validation at stage 1 has been achieved for the MODIS MAIAC products. Further details regarding MODIS land product validation for the MCD19 data products are available from the MODIS Land Team Validation site.

Collection and Granule

Collection

Characteristic Description
CollectionCombined MODIS
DOI10.5067/MODIS/MCD19A3.006
File Size~26.08 MB
Temporal ResolutionMulti-Day
Temporal Extent2000-02-01 to Present
Spatial ExtentGlobal
Coordinate SystemSinusoidal
DatumN/A
File FormatHDF-EOS
Geographic Dimensions1200 km x 1200 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers5
Columns/Rows1200 x 1200
Pixel Size1000 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
Kiso¹ RTLS isotropic kernel parameter for bands 1-8 N/A 16-bit signed integer -32767 N/A -32766 to 32767 0.0001
Kvol¹ RTLS volumetric kernel parameter for bands 1-8 N/A 16-bit signed integer -32767 N/A -32766 to 32767 0.0001
Kgeo¹ RTLS geometric kernel parameter for bands 1-8 N/A 16-bit signed integer -32767 N/A -32766 to 32767 0.0001
Sur_albedo¹ Surface albedo for bands 1-8 N/A 16-bit signed integer -28672 N/A -100 to 16000 0.0001
UpdateDay Number of days since last update to the current day N/A 8-bit unsigned integer 255 N/A 0 to 254 N/A

¹Each SDS layer contains information for bands 1-8.

Product Quality

Product quality information is described beginning on page 9 of the User Guide.

Known Issues

  • Due to Terra MODIS calibration degradation, BRDF in MODIS Band 8 may contain artifacts (e.g., 10 km striping), particularly after 2015.
  • Known issues are described on page 14 of the User Guide.

Documentation

Using the Data

Access Data

Citation

DOI: 10.5067/MODIS/MCD19A3.006

About the Image

Combined MODIS BRDF data from the MCD19A3 product over part of west Africa, August 13 - 20, 2018.

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