MCD43C2 v061

MODIS/Terra+Aqua BRDF/Albedo Snow-free Model Parameters Daily L3 Global 0.05 Deg CMG


PI: Crystal Schaaf

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Description

The Moderate Resolution Imaging Spectroradiometer (MODIS) MCD43C2 Version 6.1 Bidirectional Reflectance Distribution Function and Albedo (BRDF/Albedo) Snow-free Model Parameters dataset is produced daily using 16 days of Terra and Aqua MODIS data in a 0.05 degree (5,600 meters at the equator) Climate Modeling Grid (CMG). Data are temporally weighted to the ninth day of the retrieval period which is reflected in the Julian date in the file name. This CMG product covers the entire globe for use in climate simulation models.

Users are urged to use the band specific quality flags to isolate the highest quality full inversion results for their own science applications as described in the User Guide.

MCD43C2 provides the three model weighting parameters (isotropic, volumetric, and geometric) computed from snow-free retrievals. Each model parameter is available as a separate layer for MODIS spectral bands 1 through 7 as well as the visible, near infrared (NIR), and shortwave bands. Along with the 30 parameter layers there are ancillary layers for quality, local solar noon, percent finer resolution inputs, and uncertainty.

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Characteristics

Improvements/Changes from Previous Versions

  • The Version 6.1 Level-1B (L1B) products have been improved by undergoing various calibration changes that include: changes to the response-versus-scan angle (RVS) approach that affects reflectance bands for Aqua and Terra MODIS, corrections to adjust for the optical crosstalk in Terra MODIS infrared (IR) bands, and corrections to the Terra MODIS forward look-up table (LUT) update for the period 2012 - 2017.
  • A polarization correction has been applied to the L1B Reflective Solar Bands (RSB).

Product Maturity

Validation at stage 4 has been achieved for all MODIS BRDF/Albedo products. Further details regarding MODIS land product validation for the MCD43 data products are available from the MODIS Land Team Validation site.

Collection and Granule

Collection

Characteristic Description
CollectionCombined MODIS
DOI10.5067/MODIS/MCD43C2.061
File Size~209 MB
Temporal ResolutionDaily
Temporal Extent2000-02-16 to Present
Spatial ExtentGlobal
Coordinate SystemGeographic Latitude and Longitude
DatumN/A
File FormatHDF-EOS
Geographic DimensionsGlobal

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers34
Columns/Rows7200 x 3600
Pixel Size5600 m

Layers / Variables

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
BRDF_Albedo_Parameter1_Band1 BRDF Albedo isotropic weight for band 1 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter1_Band2 BRDF Albedo isotropic weight for band 2 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter1_Band3 BRDF Albedo isotropic weight for band 3 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter1_Band4 BRDF Albedo isotropic weight for band 4 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter1_Band5 BRDF Albedo isotropic weight for band 5 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter1_Band6 BRDF Albedo isotropic weight for band 6 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter1_Band7 BRDF Albedo isotropic weight for band 7 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter1_vis BRDF Albedo isotropic weight for vis broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter1_nir BRDF Albedo isotropic weight for NIR broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter1_shortwave BRDF Albedo isotropic weight for shortwave broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_Band1 BRDF Albedo volumeteric weight for band 1 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_Band2 BRDF Albedo volumeteric weight for band 2 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_Band3 BRDF Albedo volumeteric weight for band  3 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_Band4 BRDF Albedo volumeteric weight for band  4 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_Band5 BRDF Albedo volumeteric weight for band  5 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_Band6 BRDF Albedo volumeteric weight for band  6 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_Band7 BRDF Albedo volumeteric weight for band  7 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_vis BRDF Albedo volumeteric weight for vis broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_nir BRDF Albedo volumeteric weight for NIR broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter2_shortwave BRDF Albedo volumeteric weight for shortwave broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_Band1 BRDF Albedo geometric weight for band 1 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_Band2 BRDF Albedo geometric weight for band 2 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_Band3 BRDF Albedo geometric weight for band 3 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_Band4 BRDF Albedo geometric weight for band 4 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_Band5 BRDF Albedo geometric weight for band 5 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_Band6 BRDF Albedo geometric weight for band 6 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_Band7 BRDF Albedo geometric weight for band 7 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_vis BRDF Albedo geometric weight for vis broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_nir BRDF Albedo geometric weight for NIR broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Albedo_Parameter3_shortwave BRDF Albedo geometric weight for shortwave broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
BRDF_Quality BRDF and albedo quality informatiom N/A 8-bit unsigned integer 255 N/A 0 to 254 N/A
Local_Solar_Noon Local solar noon zenith angle Degree 8-bit unsigned integer 255 N/A 0 to 90 N/A
Percent_Inputs Percent finer resolution data which contributed to the CMG Percent 8-bit unsigned integer 255 N/A 0 to 100 N/A
BRDF_Albedo_Uncertainty BRDF inversion information N/A 16-bit unsigned integer 32767 N/A 0 to 32766 0.001

Quality bit index

Value Description
0 Best quality, 100% with full inversions
1 Good quality, 75% or more with best full inversions and 90% or more with full inversions
2 Relative good quality, 75% or more with full inversions
3 Mixed, 75% or less full inversions and 25% or less fill values
4 All magnitude inversions or 50% or less fill values
5 50% or more fill values
255 Fill Value

Known Issues

For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.


About the image

Combined MODIS BRDF Albedo parameter 1 band 1 data from the MCD43C2 product across the globe, August 2 - 17, 2020.

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Documentation

User Guide
Algorithm Theoretical Basis Document (ATBD)
File Specification

Using the Data

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Citation

DOI: 10.5067/MODIS/MCD43C2.061

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