MODIS Daily Global BRDF Geometric Parameter for Band 7

Geometric parameter data for the Bidirectional Reflectance Distribution Function (BRDF) and Albedo model derived from MODIS sensors. It is produced daily using 16 days of Terra and Aqua MODIS observations at a 30 arc-second (approximately 1 km) resolution, temporally weighted to the ninth day. The dataset is generated by LPCLOUD for the NASA Earthdata platform.

Use Cases

• Derive albedo values for MODIS band 7 using the geometric parameter in conjunction with isotropic and volumetric parameters.
• Apply band-specific quality flags to isolate highest quality full inversion results for surface reflectance analysis.
• Use the 30 arc-second Climate Modeling Grid (CMG) product as input for global climate simulation models.
• Analyze daily temporal trends in land surface reflectance by utilizing the temporally weighted geometric parameter data.

Strengths

• Daily production provides frequent updates for temporal analysis.
• Global coverage at 30 arc-second resolution suitable for climate-scale modeling.
• Data is derived from 16 days of MODIS observations from both Terra and Aqua satellites, enhancing reliability.

Limitations

• Each product file contains only one data layer, requiring multiple files for full parameter set.
• Known issues exist, requiring users to consult external assessment websites for complete details.
• The large file size per single-layer product may complicate data management.

Provenance

Source

LPCLOUD via NASA Earthdata.

Collection Method

Produced daily using 16 days of Terra and Aqua MODIS data.

Freshness

Daily

Geography

Global