 |
||||||||
| Home | About | Products | Data Tools | Order Data | News | Help/Edu | Links | Contact Us |
| EDG Data Set Name | Granule Shortname |
|---|---|
| MODIS/Terra+Aqua BRDF/Albedo Parameters 16-Day L3 Global 0.05Deg CMG | MCD43C2 |
| Version | Acquisition Range | Science Quality Status |
|---|---|---|
| V004 | July 4 2002 (2002185) | Validated |
BRDF volumetric weight for Band 4: Brighter colors show areas for which volumetric weight was most relevant in the BRDF model used to create associated Albedo and NBAR products.
Data Set Characteristics
Area = Global
Image Dimensions = 3 (3600x7200x10 row/column/band)
Average File Size = ~1638 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) = 4
Product Description
The 16-day 0.05 degree global BRDF/Albedo parameter product (MCD43C2) is a level-3 Climate Modeling Grid that provides the model parameters used to create the MODIS Global Albedo product (MCD43C1). The MCD43C2 product is offered on a flat latitude/longitude grid in HDF-EOS format. Three BRDF model parameter values are given for each of 10 wavelength bands (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). These three weighting parameters (fiso , fvol , fgeo ) are associated with the RossThickLiSparseR BRDF semi-empirical model which best describes the scattering (anisotropy) of each pixel. The data are stored band interleaved by pixel. Extensive quality information (in a bit-packed format) is also provided (3600 rows by 7200 columns).
The global measures of albedo are derived averages that are 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 (MCD43B1) are the best fit model weights determined by inverting the multi-date, multi-angular, cloud-free, atmospherically corrected surface reflectance observations acquired by MODIS over a 16-day period. These parameters can be used in a forward version of the model to fully reconstruct the surface BRDF and thus correct directional reflectances to a common view geometry or to compute the integrated black-sky (at any desired solar zenith angle) and white-sky albedos (as is done for MOD43C1). Alternately, the parameters can be used directly with a simple polynomial to easily estimate the black-sky albedo with good accuracy for any desired solar zenith angle.
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 | CALI- BRATED NT |
FIXED WATER BRDF PARAMETER |
|---|---|---|---|---|---|---|---|
| BRDF_Albedo _Parameter0 (isotropic) |
No units | 16-bit signed integer | 32767 | 0-32766 | 0.001 | 5 | 0.04 |
| BRDF_Albedo _Parameter1 (volumetric) |
No units | 16-bit signed integer | 32767 | 0-32766 | 0.001 | 5 | 0.00 |
| BRDF_Albedo _Parameter2 (geometric) |
No units | 16-bit signed integer | 32767 | 0-32766 | 0.001 | 5 | 0.00 |
| *Aggregated Albedo Quality | Flags | 32-bit unsigned integer | 4294967295 | 0-4294967294 | na | na | na |
*MODIS BRDF/Albedo QA Science Data Sets
*AM is the original name of the of the first EOS satellite, indicative of its morning equator crossing. The platform is now called "Terra."
*PM is the original name of the second EOS satellite, indicative of its afternoon equator crossing. The platform is now called "Aqua."
*MISR is the Multi-angle Imaging Spectroradiometer, and is one of the five instruments currently flying on Terra.
View a Version Formatted for Printing
Retrieve the MCD43C1v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attrib=esdt&esdt=MCD43C1.4&group=MOTA
Via FTP Directory: ftp://e4ftl01u.ecs.nasa.gov/MOTA/MCD43C1.004/
Order These Data through the EOS Data Gateway
MODIS/TERRA+AQUA BRDF/ALBEDO PARAMETERS 16-DAY L3 GLOBAL 0.05DEG CMG V004
EOS Data Gateway Search Tips
| Source: | Terra or Aqua |
|---|---|
| Sensor: | MODIS |
| Dataset: | MODIS/Terra+Aqua BRDF/Albedo Parameters 16-Day L3 Global 0.05Deg CMG |
| Geographic Extent: | Global |
| Temporal Extent: | 2002-07-04 to present |
Product Information
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 |
| LP DAAC | EROS Home | About | Products | Data Tools | Order Data | News | Help/Edu | Links | Contact Us |
| This site is hosted by the USGS - NASA Distributed Active Archive Center U.S. Government: Public Information Exchange Resource NASA: Privacy Policy and Important Notices USGS: Privacy Statement, Disclaimer, Accessibility, FOIA DOI: Privacy Statement, Privacy Disclaimer, No FEAR Act, FOIA, Performance Plan, Children's Privacy URL: http://LPDAAC.usgs.gov/modis/mcd43c1v4.asp Technical Contact: LPDAAC@eos.nasa.gov Last Update: Wednesday, July 09, 2008 Download Adobe Acrobat Reader |
 |
