VNP43D85: VIIRS Band M7 Nadir-Adjusted Reflectance Daily Global

NASA/NOAA Suomi NPP VIIRS data provides Nadir BRDF-Adjusted Reflectance (NBAR) for the 0.865 μm band (M7), modeled as if collected from a nadir view at local solar noon. This daily product uses a 16-day temporal composite at 1,000-meter resolution on a global Climate Modeling Grid. NBAR values are designed for climate simulation models by removing view angle effects from directional reflectances.

Use Cases

• Climate model simulation based on the global Climate Modeling Grid (CMG) coverage.
• Analyzing land surface albedo and anisotropy trends using the BRDF-adjusted reflectance values.
• Monitoring vegetation or surface changes using the nadir-adjusted reflectance for the 0.865 μm band.
• Assessing aerosol impacts on reflectance using the corrected aerosol quantity flag over bright surfaces.

Strengths

• Provides daily global coverage at a consistent 30 arc-second (1,000 meter) resolution.
• Algorithm removes view angle effects to model reflectance at nadir view and local solar noon, standardizing measurements.
• Includes improvements from a previous version, such as better calibration coefficients and corrected aerosol flags over specific surfaces.

Limitations

• Column names and dataset size (rows, file size) are not specified in any source.
• The dataset contains only one data layer per file, which may limit simultaneous analysis of multiple bands.
• License is listed as 'other-license-specified' on datagov but is 'None' on nasa_earthdata, indicating a conflict or lack of clear licensing information.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Produced daily using 16 days of data from the Suomi NPP VIIRS instrument, temporally weighted to the ninth day.

Freshness

2026-04-09 20:43:17.323326

Geography

Global