{"@type": "dcat:Dataset", "accessLevel": "public", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Kamel Didan", "hasEmail": "mailto:didan@email.arizona.edu"}, "description": "The NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Vegetation Indices (VNP13A2) Version 1 data product provides vegetation indices by a process of selecting the best available pixel over a 16-day acquisition period at 1 kilometer (km) resolution. The VNP13 data products are designed after the Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua Vegetation Indices product suite to promote the continuity of the Earth Observation System (EOS) mission.\r\n\r\nThe VNP13 algorithm process produces three vegetation indices: The Normalized Difference Vegetation Index (NDVI), the Enhanced Vegetation Index (EVI), and the Enhanced Vegetation Index-2 (EVI2). NDVI is one of the longest continual remotely sensed time series observations, using both the red and near-infrared (NIR) bands. EVI is a slightly different vegetation index that is more sensitive to canopy cover, while NDVI is more sensitive to chlorophyll. EVI2 is a reformation of the standard 3-band EVI, using the red band and NIR band. This reformation addresses arising issues when comparing VIIRS EVI to other EVI models that do not include a blue band. EVI2 will eventually become the standard EVI. \r\n\r\nAlong with the three Vegetation Indices layers, this product also includes layers for NIR reflectance; three shortwave infrared (SWIR) reflectance; red, blue, and green reflectance; composite day of year; pixel reliability; relative azimuth, view, and sun angles, and a quality layer. Two low resolution browse images are also available for each VNP13A2 product: EVI and NDVI.", "distribution": [{"@type": "dcat:Distribution", "description": "Search results for publications that cite this dataset by its DOI.", "downloadURL": "https://scholar.google.com/scholar?q=10.5067%2FVIIRS%2FVNP13A2.001", "format": "HTML", "mediaType": "text/html", "title": "Google Scholar search results"}, {"@type": "dcat:Distribution", "description": "The LP DAAC product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc.", "downloadURL": "https://doi.org/10.5067/VIIRS/VNP13A2.001", "format": "HTML", "mediaType": "text/html", "title": "This dataset's landing page"}, {"@type": "dcat:Distribution", "description": "The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.", "downloadURL": "https://lpdaac.usgs.gov/", "format": "HTML", "mediaType": "text/html", "title": "The dataset's project home page"}, {"@type": "dcat:Distribution", "description": "Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.", "downloadURL": "https://search.earthdata.nasa.gov/search?q=C1392010614-LPDAAC_ECS", "format": "application/x-hdf", "mediaType": "application/x-hdf", "title": "Download this dataset through Earthdata Search"}, {"@type": "dcat:Distribution", "description": "The File Specification provides a description of the product file including Scientific Data Sets and their attributes.", "downloadURL": "https://ladsweb.modaps.eosdis.nasa.gov/filespec/VIIRS/1/VNP13A2", "format": "HTML", "mediaType": "text/html", "title": "View documentation related to this dataset"}, {"@type": "dcat:Distribution", "description": "Access data via Open-source Project for a Network Data Access Protocol.", "downloadURL": "https://opendap.cr.usgs.gov/opendap/hyrax/DP101/VIIRS/VNP13A2.001/contents.html", "format": "HTML", "mediaType": "text/html", "title": "Use OPeNDAP to access the dataset's data"}, {"@type": "dcat:Distribution", "description": "The Application for Extracting and Exploring Analysis Ready Samples (A\u03c1\u03c1EEARS) offers a simple and efficient way to perform data access and transformation processes.", "downloadURL": "https://appeears.earthdatacloud.nasa.gov/", "format": "HTML", "mediaType": "text/html", "title": "Download this dataset through APPEEARS"}, {"@type": "dcat:Distribution", "description": "Validation at stage 1 has been achieved for the VIIRS Vegetation Index (VI) product suite.", "downloadURL": "https://viirsland.gsfc.nasa.gov/Val/VI_Val.html", "format": "HTML", "mediaType": "text/html", "title": "View this dataset's science data product validation documentation"}, {"@type": "dcat:Distribution", "description": "Further details regarding VIIRS product validation and maturity status are available from VIIRS Land Product Quality Assessment site.", "downloadURL": "https://viirsland.gsfc.nasa.gov/Val_overview.html", "format": "HTML", "mediaType": "text/html", "title": "View this dataset's science data product validation documentation"}], "identifier": "C1392010614-LPDAAC_ECS", "issued": "2018-07-19", "keyword": ["biosphere", "earth-science", "vegetation"], "landingPage": "https://doi.org/10.5067/VIIRS/VNP13A2.001", "language": ["en-US"], "modified": "2025-07-17", "programCode": ["026:001"], "publisher": {"@type": "org:Organization", "name": "LP DAAC"}, "spatial": "-180.0 -90.0 180.0 90.0", "temporal": "2012-01-17T00:00:00Z/2024-06-03T00:00:00Z", "theme": ["NPP-JPSS", "geospatial"], "title": "VIIRS/NPP Vegetation Indices 16-Day L3 Global 1km SIN Grid V001"}