MCD43D27: Daily Global NIR BRDF Geometric Parameter for Climate Models

Version 6.1 BRDF/Albedo geometric parameter data for the near-infrared broadband, produced daily from 16 days of combined Terra and Aqua MODIS satellite observations. The National Aeronautics and Space Administration provides this Climate Modeling Grid product at 30 arc second (approximately 1,000 meter) resolution for the entire globe. Data are temporally weighted to the ninth day of each 16-day composite period.

Use Cases

• Modeling surface energy balance in climate simulations based on the derived BRDF/Albedo values.
• Analyzing land surface reflectance properties based on the geometric, isotropic, and volumetric BRDF parameters.
• Assessing data quality for scientific applications based on the band-specific quality flags described in the user guide.
• Studying temporal changes in near-infrared reflectance based on daily production using a 16-day data window.

Strengths

• Daily global coverage at 30 arc second resolution for climate-scale modeling.
• Version 6.1 incorporates calibration improvements including RVS approach changes and polarization correction.
• Data are produced using 16 days of observations from two MODIS sensors (Terra and Aqua) for temporal stability.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Each product file contains just one data layer, which may complicate multi-parameter analysis.
• Known issues exist and require consultation of the external MODIS/VIIRS Land Quality Assessment website.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Produced daily using 16 days of Terra and Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) data.

Time Range

Daily production; temporal weighting to the ninth day of a 16-day composite.

Freshness

Last updated 2026-03-12 23:41:46.072327; freshness should be verified.

Geography

Global coverage.