VIIRS BRDF/Albedo Model Parameters at 500m Global Daily Resolution

BRDF/Albedo model parameters derived from the VIIRS/NPP satellite instrument provide daily, global land surface reflectance characteristics at a 500-meter resolution. The dataset is produced by the LANCEMODIS organization using a 16-day rolling window of data and the RTLSR kernel-driven model. Files are delivered in HDF-EOS5 format, containing six Science Dataset layers including quality bands and the fiso, fvol, and fgeo parameters for the I1, I2, and I3 spectral bands.

Use Cases

• Correcting directional reflectance to a common view geometry for consistent surface analysis using the fiso, fvol, and fgeo parameters.
• Calculating black-sky albedo at any solar illumination angle by applying a polynomial to the provided BRDF model parameters.
• Estimating instantaneous blue-sky albedo by combining the provided black-sky and white-sky albedo Science Dataset layers.
• Monitoring daily changes in land surface radiative properties for climate and environmental studies using the global 500m SIN grid.
• Reconstructing surface anisotropic effects to improve the accuracy of downstream products like albedo and normalized reflectance.

Strengths

• Provides daily global coverage at a consistent 500-meter spatial resolution.
• Uses a documented, peer-reviewed methodology (RTLSR model) detailed in an Algorithm Theoretical Basis Document.
• Derived from 16 days of VIIRS observations for each daily product, improving signal stability.
• Contains six specific Science Dataset layers, including three model parameter bands (fiso, fvol, fgeo) and quality assurance data.

Limitations

• Specific row counts, file sizes, and total dataset volume are not provided by any source.
• Sources conflict on license details: one specifies 'other-license-specified', while another lists 'None'.
• The dataset's temporal coverage start date is not specified.

Provenance

Source

LANCEMODIS organization, utilizing data from the VIIRS/NPP satellite.

Collection Method

Produced daily using the VNP43 algorithm, which processes a rolling 16-day window of VIIRS observations.

Time Range

Daily production; specific start date unknown.

Freshness

2026-03-12 20:12:17.552672

Geography

Global coverage on a 500m sinusoidal grid.