VIIRS/NPP Land Surface Temperature and Emissivity 6-Min L2 Swath 750m V001

The NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Land Surface Temperature and Emissivity (LST&E) Version 1 swath product (VNP21) is produced daily in 6-minute temporal increments of satellite acquisition. The VNP21 product uses a physics-based algorithm to dynamically retrieve both the LST and emissivity simultaneously for VIIRS thermal infrared bands M14 (8.55 µm), M15 (10.76 µm), and M16 (12 µm) at a spatial resolution of 750 meters.

The VNP21 product is developed synergistically with the Moderate Resolution Imaging Spectroradiometer (MODIS) LST&E Version 6 product (MOD21) (https://doi.org/10.5067/MODIS/MOD21.006) using the same input atmospheric products and algorithmic approach based on the ASTER Temperature Emissivity Separation (TES) technique. The TES algorithm is combined with an improved Water Vapor Scaling (WVS) atmospheric correction scheme to stabilize the retrieval during very warm and humid conditions. 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. VIIRS LST&E products are available two months after acquisition due to latency of data inputs. Additional details regarding the method used to create this Level 2 (L2) product are available in the Algorithm Theoretical Basis Document (ATBD) (https://lpdaac.usgs.gov/documents/1332/VNP21_ATBD_V1.pdf).

Provided in the VNP21 product are layers for LST, quality control, emissivity for bands M14, M15, and M16, LST&E errors, view angle, ASTER Global Emissivity Dataset (GED), Precipitable Water Vapor (PWV), ocean-land mask, latitude, and longitude. A low-resolution browse image for LST is also available for each VNP21 granule.

Data and Resources

Additional Info

Field Value
Maintainer Glynn Hulley
Last Updated July 17, 2025, 16:54 (UTC)
Created March 31, 2025, 23:21 (UTC)
accessLevel public
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citation Glynn Hulley, Simon Hook . 2019-07-09. VNP21. Version 001. VIIRS/NPP Land Surface Temperature and Emissivity 6-Min L2 Swath 750m 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/VNP21.001. https://doi.org/10.5067/VIIRS/VNP21.001. 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.001/2019.05.30/BROWSE.VNP21.A2019120.0730.001.2019149100035.1.jpg?_ga=2.88916184.2140299264.1561987470-1109527761.1561753117
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harvest_source_title DNG Legacy Data
identifier C1407099493-LPDAAC_ECS
issued 2019-07-09
landingPage https://doi.org/10.5067/VIIRS/VNP21.001
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 VNP21
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spatial -180.0 -90.0 180.0 90.0
temporal 2012-01-19T00:00:00Z/2024-06-03T00:00:00Z
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