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

Description

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.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FVIIRS%2FVNP21A2.001
20 Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data. https://search.earthdata.nasa.gov/search?q=C1553237573-LPDAAC_ECS
21 Browse image for Earthdata Search 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
21 The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products. https://lpdaac.usgs.gov/
21 Further details regarding VIIRS product validation and maturity status are available from VIIRS Land Product Quality Assessment site. https://viirsland.gsfc.nasa.gov/Val_overview.html
33 The technical information in the User's Guide enables users to interpret and use the data products. https://lpdaac.usgs.gov/documents/429/VNP21_User_Guide_V1.pdf
21 Quality Assessment provides information regarding the usability and usefulness of the data product. https://landweb.modaps.eosdis.nasa.gov/NPP_QA/
20 LP DAAC Data Pool provides direct access to available products via HTTPS. https://e4ftl01.cr.usgs.gov/VIIRS/VNP21A2.001/
33 The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. https://lpdaac.usgs.gov/documents/1332/VNP21_ATBD_V1.pdf
21 The Application for Extracting and Exploring Analysis Ready Samples (AρρEEARS) offers a simple and efficient way to perform data access and transformation processes. https://appeears.earthdatacloud.nasa.gov/
21 OPeNDAP provides direct access to data via HTTPS. https://opendap.cr.usgs.gov/opendap/hyrax/DP101/VIIRS/VNP21A2.001/contents.html
21 Validation at stage 1 has been achieved for the VIIRS land surface temperature product suite. https://viirsland.gsfc.nasa.gov/Val/LST_Val.html
21 The LP DAAC product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc. https://doi.org/10.5067/VIIRS/VNP21A2.001

Tags

  • land-surface
  • surface-radiative-properties
  • surface-thermal-properties
  • earth-science

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