MODIS NIR Broadband BRDF Geometric Parameter Daily Global Data

Geometric parameter data for the Near-Infrared broadband is produced daily from Terra and Aqua MODIS observations at 30 arc-second resolution. LPCLOUD generates this product for climate simulation models, using a 16-day rolling window of satellite data. Each daily file contains a single data layer temporally weighted to the ninth day.

Use Cases

• Derive NIR broadband albedo values by combining the geometric parameter with isotropic and volumetric parameters.
• Assess surface reflectance anisotropy for climate models using the geometric parameter layer.
• Filter for high-quality full inversion results using the band-specific quality flags described in the user guide.
• Model land surface energy balance by incorporating daily NIR BRDF parameters into radiative transfer simulations.

Strengths

• Daily production provides a high temporal cadence for monitoring surface changes.
• Global coverage at 30 arc-second (approximately 1 km) resolution supports continental-scale analysis.
• Data integrates 16 days of MODIS observations from two satellites (Terra and Aqua) for robust retrievals.

Limitations

• Each product file contains only one data layer, requiring multiple files for full parameter set analysis.
• Known issues exist, requiring users to consult external assessment websites for detailed error information.
• The reliance on a 16-day window means daily values are not from instantaneous observations but a temporally weighted composite.

Provenance

Source

LPCLOUD, using data from the Terra and Aqua MODIS instruments.

Collection Method

Produced daily using a 16-day rolling window of MODIS data, applying a BRDF/Albedo model.

Freshness

Daily

Geography

Global