VNP43MA3 v001

VIIRS/NPP Albedo Daily L3 Global 1 km SIN Grid


PI: Crystal Schaaf

Description

The Suomi National Polar-Orbiting Partnership (S-NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Bidirectional Reflectance Distribution Function (BRDF) and Albedo (VNP43MA3) Version 1 product provides albedo values at 1 kilometer (km) resolution for the bihemispherical reflectance white-sky albedo (WSA) and directional hemispherical reflectance black-sky albedo (BSA) at local solar noon. The VNP43MA3 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 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 VNP43MA1 to reconstruct surface anisotropic effects, correcting the directional reflectance to a common view geometry (VNP43MA4), while also computing integrated black-sky albedo (BSA) at local solar noon and white-sky albedo (WSA) (VNP43MA3). 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).

The VNP43MA3 product provides a total of 36 SDS layers including: BSA, WSA, and mandatory quality layers for nine VIIRS moderate bands: M1-M5, M7-M8, and M10-M11, as well as three broadbands: near-infrared (NIR), shortwave, and visible. A low-resolution image is also available showing retrievals of WSA for the shortwave broadband in JPEG format.

Characteristics

Product Maturity

Validation at stage 1 has been achieved for the VIIRS BRDF/Albedo product suite. Visit the VIIRS Land Product Quality Assessment website for additional information on validation and product maturity status.

Collection and Granule

Collection

Characteristic Description
CollectionS-NPP VIIRS
DOI10.5067/VIIRS/VNP43MA3.001
File Size~13 MB
Temporal ResolutionDaily
Temporal Extent2012-01-19 to Present
Spatial ExtentGlobal
Coordinate SystemSinusoidal
DatumN/A
File FormatHDF-EOS5
Geographic Dimensions1200 km x 1200 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers36
Columns/Rows1200 x 1200
Pixel Size1000 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
Albedo_BSA_M1 BSA (at local solar noon) for band M1 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_M10 BSA (at local solar noon) for band M10 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_M11 BSA (at local solar noon) for band M11 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_M2 BSA (at local solar noon) for band M2 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_M3 BSA (at local solar noon) for band M3 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_M4 BSA (at local solar noon) for band M4 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_M5 BSA (at local solar noon) for band M5 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_M7 BSA (at local solar noon) for band M7 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_M8 BSA (at local solar noon) for band M8 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_nir BSA (at local solar noon) for the NIR broadboad N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_shortwave BSA (at local solar noon) for the shortwave broadboad N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_BSA_vis BSA (at local solar noon) for the visible broadband N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_M1 WSA for band M1 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_M10 WSA for band M10 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_M11 WSA for band M11 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_M2 WSA for band M2 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_M3 WSA for band M3 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_M4 WSA for band M4 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_M5 WSA for band M5 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_M7 WSA for band M7 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_M8 WSA for band M8 N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_nir WSA for the NIR broadband N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
Albedo_WSA_shortwave WSA for the shortwave broadband N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
BRDF_Albedo_Band_Mandatory_Quality_vis WSA for the visible broadband N/A 16-bit signed integer 32767 N/A 0 to 1000 0.001
BRDF_Albedo_Band_Mandatory_Quality_M1 BRDF/Albedo mandatory quality band for band M1 N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_M10 BRDF/Albedo mandatory quality band for band M10 N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_M11 BRDF/Albedo mandatory quality band for band M11 N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_M2 BRDF/Albedo mandatory quality band for band M2 N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_M3 BRDF/Albedo mandatory quality band for band M3 N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_M4 BRDF/Albedo mandatory quality band for band M4 N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_M5 BRDF/Albedo mandatory quality band for band M5 N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_M7 BRDF/Albedo mandatory quality band for band M7 N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_M8 BRDF/Albedo mandatory quality band for band M8 N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_nir BRDF/Albedo mandatory quality band for the NIR broadband N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_shortwave BRDF/Albedo mandatory quality band for the shotwarve broadband N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A
BRDF_Albedo_Band_Mandatory_Quality_vis BRDF/Albedo mandatory quality band for the visible broadband N/A 8-bit unsigned integer 255 N/A 0 to 1 N/A

Product Quality

Product Quality information can be found in the ATBD in Table 10 on page 24. Product accuracy/uncertainty information can be found in section 4 on pages 20-22. Additional quality information can be found in the VNP43MA2 data product.

Known Issues

There are no known issues.

Documentation

Using the Data

Tools

Citation

DOI: 10.5067/VIIRS/VNP43MA3.001

About the Image

This image depicts white-sky albedo over Southeastern Australia from October 29, 2018.