Combined MODIS BRDF data from the MCD19A3 product over part of west Africa, August 13 - 20, 2018.
View full-size imageThe MCD19A3 Version 6 data product is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Multi-angle Implementation of Atmospheric Correction (MAIAC) Bidirectional Reflectance Distribution Function (BRDF) Model Parameters gridded Level 3 product which is output every 8 days at 1 kilometer resolution. The MCD19A3 product provides three coefficients (weights) of the RossThick/Li-Sparse (RTLS) BRDF model that can be used to describe the anisotropy of each pixel. The retrievals represent cloud-free and low aerosol conditions.
The MCD19A3 BRDF Model Parameters product contains the following Science Dataset (SDS) layers: RTLS isotropic kernel parameter (Kiso) for bands 1-8, the RTLS volumetric kernel parameter (Kvol) for bands 1-8, RTLS geometric kernel parameter (Kgeo) for bands 1-8, surface albedo for bands 1-8, and the number of days since last update to current day. Three low-resolution browse images are also included showing the BRDF coefficients for the red band: (1) Kiso, (2) Kvol, and (3) Kgeo.
No previous versions.
Validation at stage 1 has been achieved for the MODIS MAIAC products. Further details regarding MODIS land product validation for the MCD19 data products are available from the MODIS Land Team Validation site.
| Characteristic | Description |
|---|---|
| Collection | Combined MODIS |
| DOI | 10.5067/MODIS/MCD19A3.006 |
| File Size | ~26.08 MB |
| Temporal Resolution | Multi-Day |
| Temporal Extent | 2000-02-01 to 2023-02-17 |
| 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 | 5 |
| Columns/Rows | 1200 x 1200 |
| Pixel Size | 1000 m |
| SDS Name | Description | Units | Data Type | Fill Value | No Data Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|---|
| Kiso¹ | RTLS isotropic kernel parameter for bands 1-8 | N/A | 16-bit signed integer | -32767 | N/A | -32766 to 32767 | 0.0001 |
| Kvol¹ | RTLS volumetric kernel parameter for bands 1-8 | N/A | 16-bit signed integer | -32767 | N/A | -32766 to 32767 | 0.0001 |
| Kgeo¹ | RTLS geometric kernel parameter for bands 1-8 | N/A | 16-bit signed integer | -32767 | N/A | -32766 to 32767 | 0.0001 |
| Sur_albedo¹ | Surface albedo for bands 1-8 | N/A | 16-bit signed integer | -28672 | N/A | -100 to 16000 | 0.0001 |
| UpdateDay | Number of days since last update to the current day | N/A | 8-bit unsigned integer | 255 | N/A | 0 to 254 | N/A |
¹Each SDS layer contains information for bands 1-8.
Product quality information is described beginning on page 9 of the User Guide.