MODIS Daily Global BRDF Geometric Parameter for Visible Broadband

Geometric parameter data for the Bidirectional Reflectance Distribution Function (BRDF) and Albedo model, derived from the MODIS visible broadband. The dataset is produced daily at 30 arc second resolution using 16 days of Terra and Aqua MODIS observations, temporally weighted to the ninth day. It is generated by LPCLOUD for the NASA Earthdata platform.

Use Cases

• Derive visible broadband albedo values using the geometric parameter alongside isotropic and volumetric parameters.
• Assess daily surface reflectance anisotropy for climate modeling grids using the 30 arc second resolution data.
• Filter for high-quality full inversion results using the band-specific quality flags described in the user guide.
• Study temporal changes in land surface properties using the daily product with a 16-day data acquisition window.

Strengths

• Daily production provides frequent updates for temporal analysis.
• Global coverage at 30 arc second resolution suitable for climate-scale modeling.
• Data integrates observations from both Terra and Aqua MODIS instruments.

Limitations

• Each product file contains only one data layer, requiring multiple files for full parameter set.
• Known issues exist, requiring users to consult the MODIS/VIIRS Land Quality Assessment website.
• The 16-day data window means daily values are not independent instantaneous measurements.

Provenance

Source

LPCLOUD via NASA Earthdata.

Collection Method

Produced using 16 days of Terra and Aqua MODIS data, processed with a BRDF/Albedo model.

Freshness

Daily

Geography

Global