VJ143D25: VIIRS BRDF Isotropic Parameter for Band M11 at 1km Daily Global

30 arc-second (1,000 meter) resolution data provides the isotropic model parameter for the NOAA-20 VIIRS sensor's M11 band (2.25 μm). This daily product is generated using a 16-day rolling window of observations, temporally weighted to the ninth day, and is formatted on a global Climate Modeling Grid (CMG). The isotropic parameter, alongside volumetric and geometric parameters, is used to derive Bidirectional Reflectance Distribution Function (BRDF) and albedo values for climate simulation models.

Use Cases

• Modeling land surface albedo for climate simulations based on the BRDF model parameters.
• Analyzing surface anisotropy and reflectance properties in the shortwave infrared (2.25 μm) spectrum.
• Incorporating temporally smoothed, daily surface radiative data into Earth system models using the 16-day composite methodology.
• Studying global land cover changes through derived albedo values from the isotropic, volumetric, and geometric parameters.

Strengths

• Provides a specific model parameter (isotropic) for a single spectral band (M11) at a consistent 1km global resolution.
• Cross-platform presence on NASA Earthdata and Data.gov signals its importance and reliability for the scientific community.
• Algorithm benefits from stated improvements including better calibration coefficients and geolocation accuracy for the NOAA-20 mission.

Limitations

• Column names and precise data structure are not provided in any source, limiting understanding of the file's internal organization.
• The dataset's size and row count are unknown across all platforms, complicating storage and processing planning.
• Each file contains only one data layer, requiring users to manage 39 separate files (VJ143D01-VJ143D39) for the complete parameter suite.

Provenance

Source

LPCLOUD (NASA Land Processes Distributed Active Archive Center)

Collection Method

Produced daily from NOAA-20 VIIRS sensor observations using a 16-day composite algorithm.

Time Range

Daily production from the NOAA-20 satellite mission; specific start date not provided.

Freshness

2026-04-09 20:50:21.759887

Geography

Global coverage on a Climate Modeling Grid (CMG).