VNP43IA4: BRDF/Albedo Quality Daily L3 Global 500m SIN Grid

Dataset Availability: 2012-01-17T00:00:00Z–2025-05-07T00:00:00Z
Dataset Provider: NASA LP DAAC at the USGS EROS Center

Cadence: 1 Day
Tags: brdf land nasa noaa satellite-imagery surface viirs

Description

The NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Nadir Bidirectional Reflectance Distribution Function (BRDF) Adjusted Reflectance (NBAR) Version 2 product provides NBAR estimates at 500 meter resolution. The VNP43IA4 product is produced daily using 16 days of VIIRS data and is weighted temporally to the ninth day, which is reflected in the file name. The view angle effects are removed from the directional reflectances, resulting in a stable and consistent NBAR product. The VNP43 data products are designed to promote the continuity of NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) BRDF/Albedo data product suite.

The VNP43 algorithm uses the RossThick/Li-Sparse-Reciprocal (RTLSR) semi-empirical kernel-driven BRDF model, with the three kernel weights from VNP43IA1 to reconstruct surface anisotropic effects, correcting the directional reflectance to a common view geometry (VNP43IA4), while also computing integrated black-sky albedo (BSA) at local solar noon and white-sky albedo (WSA) (VNP43IA3). 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).

Documentation:

Bands

Pixel Size
500 meters

Bands

Name	Description
`BRDF_Albedo_Band_Mandatory_Quality_I1`	BRDF/Albedo mandatory quality for band I1
`BRDF_Albedo_Band_Mandatory_Quality_I2`	BRDF/Albedo mandatory quality for band I2
`BRDF_Albedo_Band_Mandatory_Quality_I3`	BRDF/Albedo mandatory quality for band I3
`Nadir_Reflectance_I1`	Nadir BRDF/Albedo Reflectance at local solar noon for band I1
`Nadir_Reflectance_I2`	Nadir BRDF/Albedo Reflectance at local solar noon for band I2
`Nadir_Reflectance_I3`	Nadir BRDF/Albedo Reflectance at local solar noon for band I3

Terms of Use

Terms of Use

LP DAAC NASA data are freely accessible; however, when an author publishes these data or works based on the data, it is requested that the author cite the datasets within the text of the publication and include a reference to them in the reference list.

Citations

Schaaf, C., Z. Wang, A. Erb, I. Paynter. VIIRS/NPP BRDF/Albedo Nadir BRDF-Adjusted Ref Daily L3 Global 500m SIN Grid V002. 2024, distributed by NASA EOSDIS Land Processes Distributed Active Archive Center, 10.5067/VIIRS/VNP43IA4.002.

DOIs

https://doi.org/10.5067/VIIRS/VNP43IA4.002

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('NASA/VIIRS/002/VNP43IA4')
                  .filter(ee.Filter.date('2021-06-01', '2021-06-03'));

var nadir_reflectance_I1 = dataset.select('Nadir_Reflectance_I1').first();
var palette = [
  '000080',
  '0000d9',
  '4000ff',
  '8000ff',
  '0080ff',
  '00ffff',
  '00ff80',
  '80ff00',
  'daff00',
  'ffff00',
  'fff500',
  'ffda00',
  'ffb000',
  'ffa400',
  'ff4f00',
  'ff2500',
  'ff0a00',
  'ff00ff',
];
var visParams = {
  min: 0,
  max: 10000,
  palette: palette,
};

// cadetblue
var background = ee.Image.rgb(95, 158, 160).visualize({min: 0, max: 255});
var image = nadir_reflectance_I1.visualize(visParams);

var lon = -8;
var lat = 60;

Map.addLayer(background, {}, 'background');
Map.addLayer(image, {}, 'Nadir BRDF/Albedo Reflectance I1');
Map.setCenter(lon, lat, 3);

Open in Code Editor

VNP43IA4: BRDF/Albedo Quality Daily L3 Global 500m SIN Grid

NASA/VIIRS/002/VNP43IA4, brdf,land,nasa,noaa,satellite-imagery,surface,viirs

2012-01-17T00:00:00Z/2025-05-07T00:00:00Z

-90 -180 90 180

Google Earth Engine

https://developers.google.com/earth-engine/datasets