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.

Characteristics

Improvements/Changes from Previous Versions

No previous versions.

Product Maturity

Validation at stage 1 has been achieved for the MCD19A3 data product.

Collection and Granule

Collection

Characteristic Description
CollectionCombined MODIS
DOI10.5067/MODIS/MCD19A3.006
File Size~4 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

Tools

Citation

DOI: 10.5067/MODIS/MCD19A3.006

About the Image