MCD43A3 v061

MODIS/Terra+Aqua Albedo Daily L3 Global 500 m SIN Grid


PI: Crystal Schaaf

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Description

The Moderate Resolution Imaging Spectroradiometer (MODIS) MCD43A3 Version 6.1 Albedo Model dataset is produced daily using 16 days of Terra and Aqua MODIS data at 500 meter (m) resolution. Data are temporally weighted to the ninth day of the 16 day which is reflected in the Julian date in the file name.

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.

The MCD43A3 provides black-sky albedo (directional hemispherical reflectance) and white-sky albedo (bihemispherical reflectance) data at local solar noon for MODIS bands 1 through 7 and the visible, near infrared (NIR), and shortwave bands. Along with the albedo layers are the simplified mandatory quality layers for each of the 10 bands. Essential quality information provided in the corresponding MCD43A2 data file should be consulted when using this product.

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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 3 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/MCD43A3.061
File Size~37 MB
Temporal ResolutionDaily
Temporal Extent2000-02-16 to Present
Spatial ExtentGlobal
Coordinate SystemSinusoidal
DatumN/A
File FormatHDF-EOS
Geographic Dimensions~1200 km x 1200 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers30
Columns/Rows2400 x 2400
Pixel Size~500 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
BRDF_Albedo_Band_Mandatory_Quality_Band1 BRDF Albedo Mandatory Quality for Band 1 Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
BRDF_Albedo_Band_Mandatory_Quality_Band2 BRDF Albedo Mandatory Quality for Band 2 Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
BRDF_Albedo_Band_Mandatory_Quality_Band3 BRDF Albedo Mandatory Quality for Band 3 Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
BRDF_Albedo_Band_Mandatory_Quality_Band4 BRDF Albedo Mandatory Quality for Band 4 Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
BRDF_Albedo_Band_Mandatory_Quality_Band5 BRDF Albedo Mandatory Quality for Band 5 Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
BRDF_Albedo_Band_Mandatory_Quality_Band6 BRDF Albedo Mandatory Quality for Band 6 Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
BRDF_Albedo_Band_Mandatory_Quality_Band7 BRDF Albedo Mandatory Quality for Band 7 Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
BRDF_Albedo_Band_Mandatory_Quality_vis BRDF Albedo Mandatory Quality for vis broadband Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
BRDF_Albedo_Band_Mandatory_Quality_nir BRDF Albedo Mandatory Quality for NIR broadband Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
BRDF_Albedo_Band_Mandatory_Quality_shortwave BRDF Albedo Mandatory Quality for shortwave broadband Bit Field 8-bit unsigned integer 255 N/A 0 to 254 N/A
Albedo_BSA_Band1 Black-Sky Albedo for Band 1 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_BSA_Band2 Black-Sky Albedo for Band 2 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_BSA_Band3 Black-Sky Albedo for Band 3 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_BSA_Band4 Black-Sky Albedo for Band 4 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_BSA_Band5 Black-Sky Albedo for Band 5 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_BSA_Band6 Black-Sky Albedo for Band 6 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_BSA_Band7 Black-Sky Albedo for Band 6 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_BSA_vis Black-Sky Albedo for vis broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_BSA_nir Black-Sky Albedo for NIR broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_BSA_shortwave Black-Sky Albedo for shortwave broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_Band1 White-Sky Albedo for Band 1 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_Band2 White-Sky Albedo for Band 2 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_Band3 White-Sky Albedo for Band 3 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_Band4 White-Sky Albedo for Band 4 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_Band5 White-Sky Albedo for Band 5 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_Band6 White-Sky Albedo for Band 6 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_Band7 White-Sky Albedo for Band 7 N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_vis White-Sky Albedo for vis broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_nir White-Sky Albedo for NIR broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001
Albedo_WSA_shortwave White-Sky Albedo for shortwave broadband N/A 16-bit signed integer 32767 N/A 0 to 32766 0.001

Mandatory Quality bit index

Value Description
0 Processed, good quality (full BRDF inversions)
1 Processed, see other QA (magnitude BRDF inversions)
2 Processed, good quality (full BRDF inversions, only Band 6 is fill value due to non-functional or noisy detectors)
3 Processed, see other QA (magnitude BRDF inversions, only Band 6 is fill value due to non-functional or noisy detectors)
4 Processed, good quality (full BRDF inversions, only Band 5 is fill value due to non-functional or noisy detectors)
5 Processed, see other QA (magnitude BRDF inversions, only Band 5 is fill value due to non-functional or noisy detectors)
6 Processed, good quality (full BRDF inversions, both Band 5 and Band 6 are fill value due to non-functional or noisy detectors)
7 Processed, see other QA (magnitude BRDF inversions, both Band 5 and Band 6 are fill value due to non-functional or noisy detectors)
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 black-sky albedo band 1 data from the MCD43A3 product over western United States June 7 - 22, 2020.

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Documentation

User Guide
Algorithm Theoretical Basis Document (ATBD)
File Specification

Using the Data

E-Learning

Data Citation Tips from NASA’s Land Processes DAAC

Data In Action

Highlights from the Literature: April to June 2017

Publications

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Access Data

Tool Functionality Description Download Data
AppEEARS Decode Quality, Order, Search, Subset The Application for Extracting and Exploring Analysis Ready Samples (AρρEEARS) offers users a simpl…
Data Pool Direct Download The Data Pool is the publicly available portion of the LP DAAC online holdings. Data Pool provides …
NASA Earthdata Search Browse Image Preview, Direct Download, Order, Search, Subset Earthdata Search combines the latest EOSDIS service offerings with user experience, research, and e…
USGS EarthExplorer Browse Image Preview, Search The EarthExplorer (EE) user interface, developed by the United States Geological Survey (USGS), pro…
OPeNDAP Direct Download, Subset The LP DAAC OPeNDAP services provide access to a number of data products at the LP DAAC. The Open-s…
DAAC2Disk Utility Direct Download The LP DAAC2Disk download manager allows users to simplify the search and HTTPS download process of…
LDOPE Decode Quality The Land Data Operational Products Evaluation (LDOPE) facility, collocated with the MODIS Adaptive …

Citation

DOI: 10.5067/MODIS/MCD43A3.061

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