|
| EDG Data Set Name |
Granule Shortname |
| MODIS/Terra+Aqua BRDF/Albedo Model-1 16-Day L3 Global 1km SIN Grid |
MCD43B1 |
| Version |
Acquisition Range |
Science Quality Status |
| V004 |
July 4 2002 (2002185) |
Validated |
Data Set Characteristics
Area = ~10° X 10° latitude/longitude
Image Dimensions = 4 (1200 x 1200 X 10 X 3 row/column/band/parameter)
Average File Size = ~112 MB
Resolution = 1 kilometer
Projection = Sinusoidal
Data Format = HDF-EOS
Science Data Sets (SDSs) = 4
Product Description
MCD43B1 contains four dimensional data sets of Bidirectional Reflectance Distribution Function (BRDF) and Albedo parameters: x, y, and parameter values are stored for each wavelength band of data. Note in the table below that the "BRDF Albedo Parameters Dimensions" cell reflects the use of all 7 MODIS Land Bands (459-2155 nm) in addition to 3 broad bands compiled from 300-700 nm, 700-5000 nm, and 300-5000 nm. This 4D combination provides users with spatial orientation as well as the weighting parameters associated with the models best describing the differences in radiation due to scattering (anisotropy) of each pixel. MODLAND's Level 3 BRDF/Albedo products
(MCD43Bs) are provided globally as discrete 1200 by 1200 element tiles in a Sinusoidal Grid projection in a HDF-EOS format.
MCD43B1 provides the primary BRDF model parameters. MCD43B3 provides the black-sky albedo (at the mean solar zenith angle at local solar noon) and the white-sky
albedo. MCD43B4 provides two NBAR values, one
at the mean solar zenith angle of Terra overpasses during the 16-day period and
the other at the mean solar zenith angle of the Aqua overpasses. Quality information is replicated and available with each quantity.
Every 16 days, the MODIS BRDF/Albedo Product (MCD43B) 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. Since the parameters of the simple kernel-based BRDF model (RossThickLiSparseR) are also provided, along with extensive quality information, the MODIS BRDF/Albedo Product offers members of the global remote sensing and modeling community the additional flexibility to derive reflectance and albedo measures particularly suited to their specific applications.
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 |
Multiply by
Scale Factor |
Additional Offset |
Dimensions |
| BRDF Albedo Parameters |
Reflectance |
16-bit signed integer |
32767 |
0 - 32766 |
0.001 |
na |
1D X-Dim
2D Y-Dim
3D#Land Bands+3
4D #Parameters |
| BRDF Shape Indicators |
Ratio or coefficient |
8-bit unsigned integer |
255 |
0 - 254 |
0.040 |
25.0 |
1D X-Dim
2D Y-Dim
3D # Shape Fields |
| *BRDF Quality |
Concatenated flags |
32-bit unsigned integer |
4294967295 |
0 - 4294967295 |
na |
na |
1D X-Dim
2D Y-Dim
3D # QC Words |
| BRDF Type |
Model or Type number |
8-bit unsigned integer |
255 |
0 - 254 |
na |
na |
1D X-Dim
2D Y-Dim
3D # Type Fields |
QC Word One
(band independent) |
Description |
| 00-01 Mandatory QA |
0 = processed, good quality
1 = processed, see other QA
2 = not processed due to cloud effects
3 = not processed due to other effects |
| 02-03 Period used |
0 = 16 days
1 = 32 days |
| 04-07 Land/Water |
0 = Shallow ocean
1 = Land (Nothing else but land)
2 = Ocean and lake shorelines
3 = Shallow inland water
4 = Ephemeral water
5 = Deep inland water
6 = Moderate or continental ocean
7 = Deep ocean |
| 08-10 AM/MISR/PM |
0 = AM
1 = AM/PM
2 = AM/PM/MISR
3 = AM/MISR
4 = PM
5 = PM/MISR
6 = MISR |
| 11-15 Mean Solar Angle of the Overpass Time |
0 = 0-5 degrees
1 = 5-10 degrees
2 = 10-15 degrees
3 = 15-20 degrees
4 = 20-25 degrees
5 = 25-30 degrees
6 = 30-35 degrees
7 = 35-40 degrees
8 = 40-45 degrees
9 = 45-50 degrees
10= 50-55 degrees
11= 55-60 degrees
12= 60-65 degrees
13= 65-70 degrees
14= 70-75 degree
15= 75-80 degrees
16= 80-90 degrees |
| 16-17 Snow |
0 = no Snow
1 = Snow present |
| 18-30 TBD |
| 31 QAfill |
0 = not fill-value
1 = fill-value |
QC Word Two
(band dependent) |
Description |
| 00-03 Band 1 Quality |
0 = RMSE good, WoD(NBAR) good, WoD(WSA) good
1 = RMSE good, WoD(NBAR) good, WoD(WSA) moderate
2 = RMSE good, WoD(NBAR) moderate, WoD(WSA) good
3 = RMSE good, WoD(NBAR) moderate, WoD(WSA) moderate
4 = RMSE moderate, WoD(NBAR) good, WoD(WSA) good
5 = RMSE moderate, WoD(NBAR) good, WoD(WSA) moderate
6 = RMSE moderate, WoD(NBAR) moderate, WoD(WSA) good
7 = RMSE moderate, WoD(NBAR) moderate, WoD(WSA) moderate
9 = magnitude inversion (numobs >3&<7)
10= magnitude inversion (numobs <=3)
11= Bus-in DB parameters
15= Fill value |
| 04-07 Band 2 Quality (see explanation for band 1) |
| 08-11 Band 3 Quality (see explanation for band 1) |
| 12-15 Band 4 Quality (see explanation for band 1) |
| 16-19 Band 5 Quality (see explanation for band 1) |
| 20-23 Band 6 Quality (see explanation for band 1) |
| 24-27 Band 7 Quality (see explanation for band 1) |
| 28-30 TBD |
| 31 QAFill |
0 = not fill-value
1 = fill value |
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View .pdf version 
 Retrieve the MCD43B1v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e0dps01u.ecs.nasa.gov:22000/OPS/drill?attrib=esdt&esdt;=MCD43B1.4&group;=MOTA
Via FTP Directory: ftp://e0dps01u.ecs.nasa.gov/MOTA/MCD43B1.004/
Order Data through the EOS Data Gateway
( http://edcimswww.cr.usgs.gov/pub/imswelcome/)
EOS Data Gateway Search Tips
| Source: |
Terra or Aqua |
| Sensor: |
MODIS |
| Dataset: |
MODIS/Terra+Aqua BRDF/Albedo Model-1 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: |
2002-07-04 to present |
Product Information
Contact Information
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