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| EDG Data Set Name | Granule Shortname |
|---|---|
| MODIS/Terra Albedo 16-Day L3 Global 1km SIN Grid | MOD43B3 |
| Version | Acquisition Range | Science Quality Status |
|---|---|---|
| V003 | August 29, 2002 (2002241) - October 7, 2002 (2002280) | Provisional as of Nov 1, 2000 |
| V004 | February 18, 2000 (2000049) | Validated Stage 1 as of February 18, 2000 |
Data Set Characteristics
Area = ~ 10° x 10° lat/long
Image Dimensions = 4 (1200x1200x10x2 row/column/band/parameter)
Average File Size = 66 MB
Resolution = 1000 meters
Projection = Sinusoidal
Data Format = HDF-EOS
Science Data Sets (SDSs) = 2
Product Description
The MODerate-resolution Imaging Spectroradiometer (MODIS) Bidirectional Reflectance Distribution Function (BRDF)/Albedo products describe how land surfaces appear under perfect scattering conditions without the influence of view angle. Every 16 days, the BRDF/Albedo algorithm relies on multidate, atmospherically corrected, cloud-cleared data and a semiempirical kernel-driven bidirectional reflectance model to determine a global set of parameters describing the BRDF of the land surface. These one kilometer gridded parameters are then used to determine directional hemispherical reflectance ("black-sky albedo"), bihemispherical reflectance ("white-sky albedo"), and nadir BRDF-adjusted reflectance (NBAR) for seven spectral bands and (in the case of albedo) three broad bands. By providing model parameters and extensive quality information, the MODIS BRDF/Albedo products offer the global remote sensing and modeling community the additional flexibility to derive reflectance and albedo measures particularly suited to their specific applications. BRDF/Albedo products are provided globally as discrete 1200 by 1200 element tiles in a Sinusoidal Grid projection (MOD43Bs) and on 0.05 degree Climate Model Grids (MOD43Cs), both in HDF-EOS format.The MODIS/Terra Albedo 16-Day L3 Global 1km SIN Grid product, MOD43B3, provides black-sky albedo (at the mean solar zenith angle at local solar noon) and white-sky albedo. Albedo is defined as the ratio of upwelling to downwelling radiative flux at the surface. Downwelling flux may be written as the sum of a direct component and a diffuse component. Black-sky albedo is defined as albedo in the absence of a diffuse component and is a function of solar zenith angle. White-sky albedo is defined as albedo in the absence of a direct component when the diffuse component is isotropic. Black-sky albedo and white-sky albedo mark the extreme cases of completely direct and completely diffuse illumination.
The MOD43B3 image displays albedo over the Great Lakes region between Canada and the United States (Tile h11v04) in July 2005.
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 | Multiply by Scale Factor |
Dimensions |
|---|---|---|---|---|---|---|
| Albedo | Albedo | 16-bit signed integer | 32767 | 0 - 32766 | 0.001 | 1D X-Dim 2D Y-Dim 3D#Land Bands+3 4D#Albedos(blacksky followed by whitesky) |
| *BRDF_Albedo_ Quality |
Concatenated Flags | 32-bit unsigned integer | 4294967295 | 0 - 4294967294 | na | 1D X-Dim 2D Y-Dim 3D # QC Words |
*MODIS BRDF/Albedo QA Science Data Sets
View a Version Formatted for Printing
Retrieve the MOD43B3v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MOD43B3.4&group=MOLT
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOLT/MOD43B3.004/
Order These Data through the EOS Data Gateway
MODIS/TERRA ALBEDO 16-DAY L3 GLOBAL 1KM SIN GRID V004
EOS Data Gateway Search Tips
| Data Center: | LPDAAC |
|---|---|
| Sensor: | MODIS |
| Dataset: | MODIS/Terra Albedo 16-Day L3 Global 1km SIN Grid |
| Spatial: | HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min |
| Geographic Extent: | Type Lat/Long Range or Draw on Map |
| Temporal Extent: | 2000-02-18 to present |
Product Information
Contact Information
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LP DAAC User Services U.S. Geological Survey (USGS) Earth Resources Observation and Science Center (EROS) 47914 252nd Street Sioux Falls, SD 57198-0001 |
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|---|---|
| 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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