MCD43C3 v006

MODIS/Terra and Aqua BRDF/Albedo Albedo Daily L3 Global 0.05 Deg CMG


PI: Crystal Schaaf

Description

The Moderate Resolution Imaging Spectroradiometer (MODIS) MCD43C3 Version 6 Bidirectional Reflectance Distribution Function and Albedo (BRDF/Albedo) Albedo 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.

MCD43C3 provides black-sky albedo (directional hemispherical reflectance) and white-sky albedo (bihemispherical reflectance) at local solar noon. Black-sky albedo and white-sky albedo values are 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 20 albedo layers are ancillary layers for quality, local solar noon, percent finer resolution inputs, snow cover, 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/MCD43C3.006
File Size~181 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) Layers25
Columns/Rows7200 x 3600
Pixel Size5600 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor Additional Offset
Albedo_BSA_Band1 Black-sky albedo for MODIS land band 1 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_BSA_Band2 Black-sky albedo for MODIS land band 2 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_BSA_Band3 Black-sky albedo for MODIS land band 3 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_BSA_Band4 Black-sky albedo for MODIS land band 4 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_BSA_Band5 Black-sky albedo for MODIS land band 5 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_BSA_Band6 Black-sky albedo for MODIS land band 6 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_BSA_Band7 Black-sky albedo for MODIS land band 7 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_BSA_vis Black-sky albedo for MODIS vis broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_BSA_nir Black-sky albedo for MODIS NIR broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_BSA_shortwave Black-sky albedo for MODIS shortwave broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_Band1 White-sky albedo for MODIS land band 1 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_Band2 White-sky albedo for MODIS land band 2 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_Band3 White-sky albedo for MODIS land band 3 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_Band4 White-sky albedo for MODIS land band 4 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_Band5 White-sky albedo for MODIS land band 5 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_Band6 White-sky albedo for MODIS land band 6 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_Band7 White-sky albedo for MODIS land band 7 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_vis White-sky albedo for MODIS vis broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_nir White-sky albedo for MODIS NIR broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_WSA_shortwave White-sky albedo for MODIS shortwave broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001 N/A
Albedo_Quality Global albedo quality N/A 8-bit unsigned integer 255 N/A 0 to 254 N/A N/A
Local_Solar_Noon Local solar noon zenith angle Degree 8-bit unsigned integer 255 N/A 0 to 90 N/A N/A
Percent_Inputs Processed finer resolution data that contributed to this CMG pixel Percent 8-bit unsigned integer 255 N/A 0 to 100 N/A N/A
Percent_Snow Underlying data flagged as snow Percent 8-bit unsigned integer 255 N/A 0 to 100 N/A N/A
BRDF_Albedo_Uncertainty BRDF inversion information N/A 16-bit unsigned integer 32767 N/A 0 to 32766 0.001 N/A

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 MCD43C3 known issues refer to the MODIS Land Quality Assessment website.

Documentation

Using the Data

Tools

Citation

DOI: 10.5067/MODIS/MCD43C3.006

About the Image