VNP43D88: VIIRS/NPP Nadir BRDF-Adjusted Reflectance for Band M11

Daily global Nadir BRDF-Adjusted Reflectance (NBAR) data for the VIIRS band M11 (2.25 μm) is produced using a 16-day temporal composite at 1,000-meter resolution. The product is part of a suite designed for climate simulation models, covering the entire globe on a Climate Modeling Grid. The NBAR algorithm removes view angle effects to model reflectance as if collected from a nadir view at local solar noon.

Use Cases

• Climate simulation modeling based on the global Climate Modeling Grid (CMG) coverage.
• Monitoring land surface reflectance changes using the daily, nadir-adjusted NBAR values.
• Analyzing surface anisotropy and albedo for band M11 (2.25 μm) as described in the product suite.
• Assessing aerosol quantity flag corrections over bright surfaces like deserts and tropical vegetation.
• Incorporating VIIRS Day/Night Band (DNB) NBAR values for nocturnal surface reflectance studies.

Strengths

• Provides daily, global coverage at a consistent 1,000-meter resolution.
• Uses a 16-day temporal composite weighted to the ninth day to improve data stability.
• Includes improvements from a previous version, such as a better calibration algorithm and geolocation accuracy.

Limitations

• Column names are unknown across all sources, limiting precise feature understanding.
• File size is described as large, with each product containing only one data layer.
• Known issues exist, requiring users to consult an external website for complete information.

Provenance

Source

NASA/NOAA Suomi NPP VIIRS instrument.

Collection Method

Data processed from the VNP43MA4 product using the NBAR algorithm described in an Algorithm Theoretical Basis Document.

Time Range

Daily production, using 16 days of data.

Freshness

2026-04-09 20:56:31.764867

Geography

Global coverage on a Climate Modeling Grid.