MCD43C2 v006

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


PI: Crystal Schaaf

Description

The Moderate Resolution Imaging Spectroradiometer (MODIS) MCD43C2 Version 6 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.

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.

Characteristics

Improvements/Changes from Previous Versions

  • Observations are weighted to estimate the BRDF/Albedo on the ninth day of the 16-day period.
  • MCD43 products use the snow status weighted to the ninth day instead of the majority snow/no-snow observations from the 16-day period.
  • Better quality at high latitudes from use of all available observations for the acquisition period. Collection 5 used only four observations per day.
  • The MCD43 products use L2G-lite surface reflectance as input.
  • When there are insufficient high quality reflectances, a database with archetypal BRDF parameters is used to supplement the observational data and perform a lower quality magnitude inversion. This database is continually updated with the latest full inversion retrieval for each pixel.
  • CMG Albedo is estimated using all the clear-sky observations within the 1,000 m grid for MCD43C as opposed to aggregating from the 500 m albedo.

Product Maturity

The MODIS BRDF/Albedo products have achieved stage 3 validation.

Collection and Granule

Collection

Characteristic Description
CollectionCombined MODIS
DOI10.5067/MODIS/MCD43C2.006
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

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 the MCD43C2 known issues refer to the MODIS Land Quality Assessment website.

Documentation

Using the Data

Tools

Citation

DOI: 10.5067/MODIS/MCD43C2.006

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