Combined MODIS BRDF Albedo Valid Observations 1-4-3 data from the MCD43A2 product over western United States June 7 - 22, 2020.
View full-size imageThe Moderate Resolution Imaging Spectroradiometer (MODIS) MCD43A2 Version 6.1 Bidirectional Reflectance Distribution Function and Albedo (BRDF/Albedo) Quality dataset is produced daily using 16 days of Terra and Aqua MODIS data at 500 meter (m) resolution. Data are temporally weighted to the ninth day of the 16-day retrieval period which is reflected in the Julian date in the file name. MCD43A2 contains the quality information for the corresponding MCD43A3 Albedo and MCD43A4 Nadir BRDF-Adjusted Reflectance (NBAR) products.
Users are urged to use the band specific quality flags to isolate the highest quality full inversion results for their own science applications as described in the User Guide.
The MCD43A2 contains BRDF/Albedo band quality (inversion information) and days of valid observation within the 16-day period for MODIS bands 1 through 7 along with land water type, snow BRDF albedo, local solar noon, platform, and BRDF/Albedo uncertainty.
Validation at stage 4 has been achieved for all MODIS BRDF/Albedo products. Further details regarding MODIS land product validation for the MCD43 data products are available from the MODIS Land Team Validation site.
| Characteristic | Description |
|---|---|
| Collection | Combined MODIS |
| DOI | 10.5067/MODIS/MCD43A2.061 |
| File Size | ~1 MB |
| Temporal Resolution | Daily |
| Temporal Extent | 2000-02-16 to Present |
| Spatial Extent | Global |
| Coordinate System | Sinusoidal |
| Datum | N/A |
| File Format | HDF-EOS |
| Geographic Dimensions | ~1200 km x 1200 km |
| Characteristic | Description |
|---|---|
| Number of Science Dataset (SDS) Layers | 19 |
| Columns/Rows | 2400 x 2400 |
| Pixel Size | ~500 m |
| SDS Name | Description | Units | Data Type | Fill Value | No Data Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|---|
| Snow_BRDF_Albedo | Snow-free BRDF/Albedo retrieved | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_Platform | BRDF Albedo Platform information | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_LandWaterType | Land Water Type | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_LocalSolarNoon | Solar Zenith Angle of Local Solar Noon | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_ValidObs_Band1 | Valid Observation for Band 1 | N/A | 16-bit unsigned integer | 0 | N/A | 1 to 65535 | N/A |
| BRDF_Albedo_ValidObs_Band2 | Valid Observation for Band 2 | N/A | 16-bit unsigned integer | 0 | N/A | 1 to 65535 | N/A |
| BRDF_Albedo_ValidObs_Band3 | Valid Observation for Band 3 | N/A | 16-bit unsigned integer | 0 | N/A | 1 to 65535 | N/A |
| BRDF_Albedo_ValidObs_Band4 | Valid Observation for Band 4 | N/A | 16-bit unsigned integer | 0 | N/A | 1 to 65535 | N/A |
| BRDF_Albedo_ValidObs_Band5 | Valid Observation for Band 5 | N/A | 16-bit unsigned integer | 0 | N/A | 1 to 65535 | N/A |
| BRDF_Albedo_ValidObs_Band6 | Valid Observation for Band 6 | N/A | 16-bit unsigned integer | 0 | N/A | 1 to 65535 | N/A |
| BRDF_Albedo_ValidObs_Band7 | Valid Observation for Band 7 | N/A | 16-bit unsigned integer | 0 | N/A | 1 to 65535 | N/A |
| BRDF_Albedo_Band_Quality_Band1 | BRDF Inversion Information for Band 1 | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_Band_Quality_Band2 | BRDF Inversion Information for Band 2 | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_Band_Quality_Band3 | BRDF Inversion Information for Band 3 | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_Band_Quality_Band4 | BRDF Inversion Information for Band 4 | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_Band_Quality_Band5 | BRDF Inversion Information for Band 5 | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_Band_Quality_Band6 | BRDF Inversion Information for Band 6 | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_Band_Quality_Band7 | BRDF Inversion Information for Band 7 | Bit Field | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
| BRDF_Albedo_Uncertainty | BRDF Albedo Uncertainty | N/A | 16-bit unsigned integer | 32767 | N/A | 0 to 32766 | 0.001 |
Information for the Snow_BRDF_Albedo, BRDF_Albedo_Platform, BRDF_Albedo_LandWatertype, BRDF_Albedo_ValidObs_Band1 through 7, and BRDF_Albedo_Band_Quality_Band1 through 7 legends are available in the MCD43A2 File Specification.
For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.