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EDG Data Set Name	Granule Shortname
MODIS/Terra+Aqua Albedo 16-Day L3 Global 0.05Deg CMG	MCD43C1

Version	Acquisition Range	Science Quality Status
V004	July 4 2002 (2002185)	Validated

Data Set Characteristics
Area = Global
Image Dimensions = 3 (3600x7200x10 row/column/band)
Average File Size = ~1126 MB
Resolution = 0.05 degree (~5 km)
Projection = Latitude/Longitude Grid
Data Type Albedo = 16-bit Signed Integer
Data Type Quality = 32-bit Unsigned Integer
Data Format = HDF-EOS
Science Data Sets (SDS) = 3

Product Description
The 16-day 0.05Deg global albedo product (MCD43C1) is a Level-3 Climate Modeling Grid product that provides measures of Earth's white-sky and black-sky albedo.  These measures are derived averages computed from the 16-Day 1 km global albedo product (MCD43B3). The 1 km global albedo is computed by integrating the Bi-directional Reflectance Distribution Function (BRDF), which describes the characteristic anisotropy of the land surface.  The MODIS BRDF parameters are modeled by inverting multi-date, multi-angular, cloud-free, atmospherically corrected surface reflectance observations acquired by MODIS over a 16-day period.

Black-sky albedo and white-sky albedo mark the extreme cases of both completely direct and diffuse illumination. Black-sky albedo, or directional hemispherical reflectance, is defined as albedo in the absence of a diffuse component and is a measure of a surface's relative brightness when illuminated from a certain angle.  MODIS black-sky albedo is calculated at the solar zenith angle of local solar noon.  White-sky albedo, or bi-hemispherical reflectance, is defined as albedo in the absence of a direct component when the diffuse component is isotropic.

MCD products are generated using a combination of Terra and Aqua acquisitions to optimize data quality.

NOTE:  These products are validated, meaning that product uncertainties are well defined over a range of representative conditions. Although there may be later improved versions, these data are ready for use in scientific publications.

SDS	UNITS	DATA TYPE -bit	FILL VALUE	VALID RANGE	SCALING FACTOR	CALIBRATED NT
Global Black Sky Albedo	Albedo	16-bit signed integer	32767	0-32766	0.001	5
Global White Sky Albedo	Albedo	16-bit signed integer	32767	0-32766	0.001	5
Aggregated Albedo Quality	Flags	32-bit unsigned integer	4294967295	0-4294967294	na	na

*MODIS BRDF/Albedo QA Science Data Sets

View a Version Formatted for Printing

Retrieve the MCD43C3v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MCD43C3.4&group=MOTA
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOTA/MCD43C3.004/

Order These Data through the EOS Data Gateway
MODIS/TERRA+AQUA NADIR BRDF-ADJUSTED REFLECTANCE 16-DAY L3 GLOBAL 1KM SIN GRID V004

EOS Data Gateway Search Tips

Source:	Terra or Aqua
Sensor:	MODIS
Dataset:	MODIS/Terra+Aqua Albedo 16-Day L3 Global 0.05Deg CMG
Geographic Extent:	Global
Temporal Extent:	2002-07-04 to present

Product Information

Product Description (http://landval.gsfc.nasa.gov/MODLAND/brdf.htm)

User Guide (http://www-modis.bu.edu/brdf/userguide/index.html)

Algorithm Theoretical Basis Document (ATBD) (http://modis.gsfc.nasa.gov/data/atbd/land_atbd.php)

MODIS Standard Data Products Catalog (http://modis.gsfc.nasa.gov/data/dataprod/index.php)

EOS Data Products Handbook Volume 2 (2000) (http://eospso.gsfc.nasa.gov/eos_homepage/for_scientists/data_products/vol2.php)

Contact Information

LP DAAC User Services U.S. Geological Survey (USGS) Earth Resources Observation and Science Center (EROS) 47914 252nd Street Sioux Falls, SD 57198-0001
Phone:	605-594-6116
Toll Free:	866-573-3222
	866-LPE-DAAC
Fax:	605-594-6963
Email:	LPDAAC@eos.nasa.gov
Web:	http://LPDAAC.usgs.gov

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