VIIRS/JPSS1 Gross and Net Primary Production Gap-Filled Yearly L4 Global 500m SIN Grid V002

Description

The NOAA-20 Visible Infrared Imaging Radiometer Suite (VIIRS) Gross and Net Primary Production (NPP) Gap-Filled (VJ117A3GF) Version 2 data product is a cumulative composite of Gross Primary Productivity (GPP) values based on the radiation-use efficiency concept that is potentially used as inputs to data models to calculate terrestrial energy, carbon, water cycle processes, and biogeochemistry of vegetation. VJ117A3GF is a yearly composite at 500 meter spatial resolution delivered as a gridded Level 4 (L4) product in Sinusoidal projection.The VJ117A3GF will be generated at the end of each year when the entire yearly 8-day VJ115A2H is available. Hence, the gap-filled VJ117A3GF is the improved VJ117A2, which has cleaned the poor-quality inputs from 8-day Leaf Area Index and Fraction of Photosynthetically Active Radiation (LAI/FPAR) based on the Quality Control (QC) label for every pixel. If any LAI/FPAR pixel did not meet the quality screening criteria, its value is determined through linear interpolation. However, users cannot get VJ117A3GF in near-real time because it will be generated only at the end of a given year. Provided in the VJ117A3GF product are layers for GPP, NPP, along with a quality control layer. A low resolution browse image for GPP is also available for each VJ117A3GF granule.Known Issues* For complete information about known issues please refer to the [MODIS/VIIRS Land Quality Assessment website](https://landweb.modaps.eosdis.nasa.gov/knownissue?sensor=VIIRS).

Resources

Name Format Description Link
21 VJ117A3GF.002 https://doi.org/10.5067/VIIRS/VJ117A3GF.002
5 https://www.earthdata.nasa.gov/centers/lp-daac
5 https://landweb.modaps.eosdis.nasa.gov/
5 https://search.earthdata.nasa.gov/search?q=C2885053254-LPCLOUD
33 VNP17_User_Guide_V1.pdf https://lpdaac.usgs.gov/documents/2255/VNP17_User_Guide_V1.pdf
21 Val_overview.html https://viirsland.gsfc.nasa.gov/Val_overview.html
22 BROWSE.VJ117A3GF.A2024001.h11v11.002.2025014202553.1.jpg https://data.lpdaac.earthdatacloud.nasa.gov/lp-prod-public/VJ117A3GF.002/VJ117A3GF.A2024001.h11v11.002.2025014202553/BROWSE.VJ117A3GF.A2024001.h11v11.002.2025014202553.1.jpg

Tags

  • earth-science-precipitation-atmosphere-precipitation-profiles-latent-heat-flux
  • earth-science-atmospheric-water-vapor-atmosphere-water-vapor-processes-evaporation
  • earth-science-atmospheric-water-vapor-atmosphere-water-vapor-processes-evapotranspiration

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