VIIRS/NPP Land Surface Temperature/Emissivity 8-Day L3 Global 1km SIN Grid V001

The NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Land Surface Temperature and Emissivity (LST&E) 8-day product (VNP21A2) combines the daily (VNP21A1D) (http://doi.org/10.5067/VIIRS/VNP21A1D.001) and (VNP21A1N) (http://doi.org/10.5067/VIIRS/VNP21A1N.001) products over an 8-day compositing period into a single product.

The VNP21A2 dataset is an 8-day composite LST&E product at 1 kilometer resolution that uses an algorithm based on a simple-averaging method. The algorithm calculates the average from all the cloud-free VNP21A1D and VNP21A1N daily acquisitions from the 8-day period. Unlike the VNP21A1 datasets where the daytime and nighttime acquisitions are separate products, the VNP21A2 contains both daytime and nighttime acquisitions as separate science dataset (SDS) layers within a single Hierarchical Data Format (HDF) file.

The VNP21A2 product is developed synergistically with the Moderate Resolution Imaging Spectroradiometer (MODIS) LST&E Version 6 product (MOD21A2) (https://doi.org/10.5067/MODIS/MOD21A2.006) using the same input atmospheric products and algorithmic approach. The overall objective for NASA VIIRS products is to ensure the algorithms and products are compatible with the MODIS Terra and Aqua algorithms to promote the continuity of the Earth Observation System (EOS) mission. Additional details regarding the method used to create this Level 3 (L3) product are available in the Algorithm Theoretical Basis Document (ATBD) (https://lpdaac.usgs.gov/documents/1332/VNP21_ATBD_V1.pdf). VIIRS LST&E products are available 2 months after acquisition due to latency of data inputs.

The VNP21A2 product contains 11 Science Datasets (SDS): LST, quality control, view zenith angle, and time of observation for both day and night observations along with emissivity for bands M14, M15, and M16. Low-resolution browse images for day and night LST are also available for each VNP21A2 granule.

Data and Resources

Additional Info

Field Value
Maintainer Glynn Hulley
Last Updated July 17, 2025, 14:39 (UTC)
Created April 23, 2025, 22:39 (UTC)
accessLevel public
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citation Glynn Hulley, Simon Hook . 2019-07-09. VNP21A2. Version 001. VIIRS/NPP Land Surface Temperature/Emissivity 8-Day L3 Global 1km SIN Grid V001 . Sioux Falls, South Dakota, USA. Archived by National Aeronautics and Space Administration, U.S. Government, NASA EOSDIS Land Processes Distributed Active Archive Center. https://doi.org/10.5067/VIIRS/VNP21A2.001. https://doi.org/10.5067/VIIRS/VNP21A2.001. Digital Science Data. This data set was provided by the NASA/NOAA NPP Project. The DOI landing page provides citations in APA and Chicago styles. .
creator Glynn Hulley, Simon Hook
data-presentation-form Digital Science Data
graphic-preview-description Browse image for Earthdata Search
graphic-preview-file https://e4ftl01.cr.usgs.gov/WORKING/BRWS/Browse.001/2019.05.31/BROWSE.VNP21A2.A2019113.h16v07.001.2019150110840.1.jpg?_ga=2.88990040.2140299264.1561987470-1109527761.1561753117
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harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C1553237573-LPDAAC_ECS
issued 2019-07-09
landingPage https://doi.org/10.5067/VIIRS/VNP21A2.001
language {en-US}
metadata_type geospatial
modified 2019-07-09
programCode {026:001}
publisher LP DAAC
release-place Sioux Falls, South Dakota, USA
resource-type Dataset
series-name VNP21A2
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spatial -180.0 -90.0 180.0 90.0
temporal 2012-01-25T00:00:00Z/2024-06-03T00:00:00Z
theme {NPP-JPSS,geospatial}