MODIS Daily NIR Broadband BRDF Volumetric Parameter

MCD43D26 provides the volumetric parameter for the near-infrared broadband, derived from 16 days of Terra and Aqua MODIS satellite data. The dataset is produced daily at a 30 arc-second (1,000 meter) global resolution for climate simulation grids. LPCLOUD generates this product as part of the MODIS Version 6.1 BRDF/Albedo model parameter suite.

Use Cases

• Model NIR broadband albedo by combining the volumetric parameter with isotropic and geometric parameters from the BRDF model.
• Assess daily surface reflectance changes in the NIR spectrum using the temporally-weighted 16-day data window.
• Filter data quality for climate applications using the band-specific quality flags referenced in the user guide.
• Integrate the 30 arc-second CMG layer into global climate simulation models for surface parameterization.

Strengths

• Daily production provides frequent updates for temporal analysis.
• Global coverage at 30 arc-second resolution supports climate-scale modeling.
• Data is temporally weighted to the ninth day of a 16-day acquisition period for stability.

Limitations

• Each product file contains only one data layer, requiring multiple files for full parameter sets.
• Users must manually apply quality flags to isolate high-quality full inversion results.
• Known issues exist, requiring consultation of the MODIS/VIIRS Land Quality Assessment website.

Provenance

Source

LPCLOUD, utilizing data from NASA's Terra and Aqua MODIS instruments.

Collection Method

Produced daily using 16 days of MODIS data, applying a BRDF/Albedo model.

Time Range

Daily coverage, temporally weighted to the ninth day of a 16-day window.

Freshness

daily

Geography

global