The NOAA-21 Visible Infrared Imaging Radiometer Suite (VIIRS) Bidirectional Reflectance Distribution Function (BRDF) and Albedo Model Parameter 2 Day/Night Band (DNB) product (VJ243D38) is produced daily using 16 days of data at 30 arc second (1,000 meter) resolution. Data are temporally weighted to the ninth day, which is reflected in the file name. The VJ243D product suite is provided in a Climate Modeling Grid (CMG), which covers the entire globe for use in climate simulation models. Due to the large file size, each VJ243D product contains just one data layer. Each of the three model parameters (isotropic, volumetric, and geometric) for each of the nine VIIRS moderate resolution bands along with the visible, near-infrared (NIR), and shortwave bands included in the VJ243MA1 product is stored in a separate file as VJ243D01 through VJ243D36. In addition to the bands included in VJ243MA1, this product suite includes model parameters for the VIIRS Day/Night Band (DNB) as VJ243D37 through VJ243D39. Details regarding methodology are available on the VJ243MA1 product page and in the Algorithm Theoretical Basis Document (ATBD).
VJ243D38 is the BRDF volumetric parameter for the VIIRS DNB (0.7 μm). The volumetric parameter, in conjunction with the isotropic and geometric parameters, is used to derive the BRDF/Albedo values for the VIIRS DNB.
Known Issues
* For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.