VJ143D18: VIIRS Band M7 BRDF Geometric Parameter Daily Global 1km

VJ143D18 provides the geometric model parameter for the Bidirectional Reflectance Distribution Function (BRDF) and Albedo for NOAA-20 VIIRS band M7 (0.865 μm). This daily product is generated using a 16-day rolling window of data, temporally weighted to the ninth day, and is projected on a global 30 arc-second (1,000 meter) Climate Modeling Grid. The geometric parameter, alongside isotropic and volumetric parameters, is used to derive surface reflectance and albedo values for climate simulation and land surface monitoring.

Use Cases

• Incorporating surface anisotropy into climate models based on the global Climate Modeling Grid (CMG) data structure.
• Deriving land surface albedo for band M7 using the geometric parameter in conjunction with isotropic and volumetric parameters.
• Monitoring temporal changes in surface reflectance properties using the daily product with a 16-day composite window.
• Assessing BRDF model performance for the VIIRS Day/Night Band (DNB) by referencing the extended parameter suite (VJ143D37-39).

Strengths

• Provides a specific, single data layer (the geometric parameter for band M7) optimized for global climate models.
• Offers daily temporal resolution with a 16-day composite window to balance data continuity and noise reduction.
• Cross-platform presence on NASA/Data.gov indicates established importance and operational use.

Limitations

• Metadata completeness is low: specific column names, row counts, and file sizes are not provided in any source.
• The dataset is part of a 39-file suite (VJ143D01-D39), requiring users to manage multiple files for a complete parameter set.
• Known issues exist and require external reference to the MODIS/VIIRS Land Quality Assessment website for full details.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Produced daily from NOAA-20 VIIRS sensor data using a defined BRDF/albedo algorithm.

Time Range

Daily production suggests coverage from the NOAA-20 satellite launch onward, but specific start date is not provided.

Freshness

2026-04-09 21:06:16.364630

Geography

Global coverage on a Climate Modeling Grid (CMG).