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MCD43D24 V006

10.5067/MODIS/MCD43D24.006
MODIS/Terra and Aqua BRDF/Albedo Parameter 3 VIS Daily L3 Global 30 ArcSec CMG
MCD43D24

The MCD43D24 Version 6 Bidirectional Reflectance Distribution Function and Albedo (BRDF/Albedo) Model Parameter data set is a daily 16-day product. This product incorporates the Climate Modeling Grid (CMG) structure in which each file geographically covers the entire earth rather than the 10 degree x 10 degree latitude and longitude tiling system utilized by the standard MODIS land products. Unlike the standard CMG pixel resolution of 5600 meters the MCD43D products are 1000 meters, consequently, because of the large file size each product contains just one layer. The Julian date in the granule ID of each specific file represents the 9th day of the 16 day retrieval period, and consequently the observations are weighted to estimate the BRDF/Albedo for that day.
The layer in the MCD43D24 is the Bidirectional Reflectance Distribution Function geometric parameter for the MODIS visual broadband. This geometric parameter, in conjunction with the isotropic and volumetric parameters, is used to derive the Albedo and BRDF value for the MODIS visual broadband . The MODIS BRDF/ALBEDO products have achieved stage 3 validation.

Improvements/Changes from Previous Versions

  • The MCD43 products are generated daily, still using the 16-day retrieval algorithm.
  • Observations are weighted to estimate the BRDF/Albedo at the first day of the 2nd 8-day period of the 16-day period.
  • The MCD43 products use an improved back up database – they are pixel based updated from the latest full inversion as opposed to the land cover based DB used in C5.
  • There is improved quality and more retrieval at high latitudes from use of all available observations. C5 used only four observations per day.
  • MCD43 products now use current day snow status instead of the majority snow/no-snow status from the 16-day period.
  • The MCD43 products now uses L2G-lite surface reflectance as input

Collection

Characteristic Description
Temporal Granularity Daily
Temporal Extent February 2000 -- Present
Spatial Extent Global
File Size ~146.5 MB
Coordinate System Lat/Long Grid
Datum N/A
File Format hdf-eos
Geographic Dimensions ~Entire Globe

 

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers 1
Columns/Rows 43200 columns x 21600 rows
Pixel Size ~1000

 

Data Layer Characteristics

SDS Name Description Units Data Type Fill Value Valid Range Scale Factor
BRDF_Albedo_Parameter3_Vis BRDF model parameter for geo kernel of vis broadband Parameter 16-bit unsigned integer 32767 0 to 32766 0.001

 

Product Quality

See the corresponding MCD43D31 for product quality information.

 

Known Issues

For complete information about the MCD43D24 known issues refer to the MODIS Land Quality Assessment website: http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/getSummary.cgi?esdt=MCD43&type=C6

MCD43D24 Thumbnail

MCD43D24. Acquired August 1, 2005. Tile H11V05. Global.

PI Name: 
Crystal Schaaf
Other Tools: 
Decommissioned: 
False