Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

VIIRS/NPP Albedo Daily L3 Global 500m SIN Grid NRT

Metadata Updated: February 3, 2025

The VIIRS/NPP Albedo Daily L3 Global 500 m SIN Grid Near Real Time (NRT), short-name VNP43IA3N product provides albedo values at 500 m resolution for the bi-hemispherical reflectance white-sky albedos (WSA) and directional hemispherical reflectance black-sky albedos (BSA) at local solar noon. The VNP43IA3N product is produced daily using 16-day VIIRS data (i.e., the current day and the previous 15 days).

The VNP43 algorithm uses the RossThick/Li-Sparse-Reciprocal (RTLSR) semi-empirical kernel-driven BRDF model, with the three kernel weights from VNP43IA1N to reconstruct surface anisotropic effects, correcting the directional reflectance to a common view geometry (VNP43IA4N), while also computing integrated black-sky albedo (BSA) at local solar noon and white-sky albedo (WSA) (VNP43IA3N). Researchers can use the BRDF model parameters with a simple polynomial, to obtain black-sky albedo at any solar illumination angle. Likewise, both the BSA and WSA Science Dataset (SDS) layers can be used with a simple polynomial, to manually estimate instantaneous actual albedo (blue-sky albedo). Additional details regarding the methodology are available in the Algorithm Theoretical Basis Document (ATBD) at https://www.umb.edu/editor_uploads/images/school_for_the_environment_cs/Viirs/VIIRS_ATBD_Apr_Jul2017.pdf

The VNP43IA3N product provides a total of 9 SDS layers including: BSA, WSA, and mandatory quality layers for VIIRS imagery bands I1, I2, and I3.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date December 6, 2023
Metadata Updated Date February 3, 2025

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date December 6, 2023
Metadata Updated Date February 3, 2025
Publisher NASA/GSFC/SED/ESD/TISL/MODAPS
Maintainer
Identifier C2807588708-LANCEMODIS
Data First Published 2023-11-20
Language en-US
Data Last Modified 2025-02-18
Category Suomi-NPP, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation LANCEMODIS. 2023-11-20. VIIRS/NPP Albedo Daily L3 Global 500m SIN Grid NRT. Version 2. NASA GSFC LANCE. Archived by National Aeronautics and Space Administration, U.S. Government, LANCEMODIS. https://doi.org/10.5067/VIIRS/VNP43IA3N.002. https://doi.org/10.5067/VIIRS/VNP43IA3N.002.
Creator LANCEMODIS
Harvest Object Id 35c1029a-df39-416f-b9f6-434b1c25703a
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.5067/VIIRS/VNP43IA3N.002
Metadata Type geospatial
Old Spatial -180.0 -80.0 180.0 80.0
Program Code 026:001
Release Place NASA GSFC LANCE
Source Datajson Identifier True
Source Hash 6b6c85b780df8415ab82b340e800c0b5d9336c660260da200962af7a1a279752
Source Schema Version 1.1
Spatial
Temporal 2023-11-20T00:00:00Z/2025-02-03T00:00:00Z

Didn't find what you're looking for? Suggest a dataset here.