VIIRS 16-Day Vegetation Indices
Datasets:
- VIIRS 16-Day Vegetation Indices
Description:
The Suomi National Polar-Orbiting Partnership (S-NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Vegetation Indices (VNP13A1) data product provides vegetation indices by a process of selecting the best available pixel over a 16-day acquisition period at 500 meter 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.
The VNP13 algorithm process produces three vegetation indices: (1) Normalized Difference Vegetation Index (NDVI), (2) the Enhanced Vegetation Index (EVI), and (3) Enhanced Vegetation Index-2 (EVI2). (1) NDVI is one of the longest continual remotely sensed time series observations, using both the red and near-infrared (NIR) bands. (2) EVI is a slightly different vegetation index that is more sensitive to canopy cover, while NDVI is more sensitive to chlorophyll. (3) 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.
Along with the three Vegetation Indices layers, this product also includes layers for near-infrared (NIR) reflectance; three shortwave infrared (SWIR) reflectance-red, blue, and green reflectance; composite day of year; pixel reliability; view and sun angles, and a quality layer.
Organization: NOAA / NASA
Website: https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=2032
Google Earth Engine:
Spatial resolution: 500 m
Time Span: 2012 to Present (3-week latency)
Variables:
- EVI: Enhanced Vegetation Index
- EVI2: Enhanced Vegetation Index (2-band)
- LST: Daytime Land Surface Temperature
- NDVI: Normalized Difference Vegetation Index
- NDSI: Normalized Difference Snow Index
- NDWI: Normalized Difference Water Index
- True-color image
- False-color image
Terms of Use:
- All data products distributed by NASA's Land Processes Distributed Active Archive Center (LP DAAC) are available at no charge.