Imaging · collection · 2026
VIIRS/JPSS2 Gross Primary Productivity and Net Photosynthesis Gap-Filled 8-Day L4 Global 500m SIN Grid V002
Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/viirs/vj217a2gf.002
Description
The NOAA-21 Visible Infrared Imaging Radiometer Suite (VIIRS) Gross Primary Productivity (GPP) and Net Photosynthesis (PSN) Gap-Filled (VJ217A2GF) Version 2 product is a cumulative composite of 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. VJ217A2GF is an 8-day composite at 500 meters (m) spatial resolution delivered as a gridded Level 4 (L4) product in Sinusoidal projection.
The VJ217A2GF will be generated at the end of each year when the entire yearly 8-day VJ215A2H is available. Hence, the gap-filled VJ217A2GF is the improved VJ217A2, 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.
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However, users cannot get VJ217A2GF in near-real time because it will be generated only at the end of a given year. Provided in the VJ217A2GF product are variables for GPP, PSN, along with a quality control variable. A low resolution browse image for GPP is also available for each VJ217A2GF granule.
Known Issues
* For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.
Links
Get the data
- Resource doi.org/10.5067/viirs/vj217a2gf.002 ↗
The LP DAAC product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc.
landing page · download · DOI / persistent id · from NASA CMR, data nasa gov
- Resource landweb.modaps.eosdis.nasa.gov ↗
The LDOPE Land Product Quality Assessment website provides known issues, maneuvers, and product quality of the land products.
documentation · download · from NASA CMR, data nasa gov
- Resource viirsland.gsfc.nasa.gov/Val_overview.html ↗
Further details regarding VIIRS product validation and maturity status are available from VIIRS Land Product Quality Assessment site.
documentation · download · from NASA CMR, data nasa gov
- PDF lpdaac.usgs.gov/documents/2255/VNP17_User_Guide_V1.pdf ↗
The technical information in the User's Guide enables users to interpret and use the data products.
documentation · download · from NASA CMR, data nasa gov
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C2885062907-LPCLOUD.iso19115 ↗
download · from data nasa gov
- search.earthdata.nasa.gov /search/granules?p=C2885062907-LPCLOUD ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- Resource earthdata.nasa.gov/centers/lp-daac ↗
The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.
download · project · from data nasa gov, NASA CMR
- JPEG data.lpdaac.earthdatacloud.nasa.gov/lp-prod-public/VJ217A2GF.002/VJ217A2GF.A2023001.h21v06.002.202… ↗
download · preview image · from data nasa gov, NASA CMR
- appeears.earthdatacloud.nasa.gov ↗
The Application for Extracting and Exploring Analysis Ready Samples (AppEEARS) offers a simple and efficient way to perform data access and transformation processes.
download · from NASA CMR
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/viirs-jpss2-gross-primary-productivity-and-net-photosy… ↗
landing page · from data nasa gov
Catalogue records · 3
- CKAN API data.nasa.gov/api/3/action/package_show?id=f9cb1c76-95b1-43c5-9267-c24fa31ed… ↗
metadata API · from data nasa gov
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C2885062907-LPCLOUD.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C2885062907-LPCLOUD.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Evaporation · Evapotranspiration · Joint Polar Satellite System - 2 · Latent Heat Flux · Vegetation Productivity · Visible-Infrared Imager-Radiometer Suite
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
- Inferred from text
- Climate change science 69% · Image 75% · Imaging 75%
Provenance · 2 source records, 23 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C2885062907-LPCLOUD | 10 d ago | JSON v1 |
| NASA Data Portal | f9cb1c76-95b1-43c5-9267-c24fa31ed0f6 | 7 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3702 | enrichment · NASA CMR | taxonomy-embedding@1.0.0 | title+keywords+description (69%) |
| concepts[field].local:field:astronomy | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:physics | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[instrument].gcmd_instrument:viirs | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-water-vapor/water-vapor-processes/evaporation | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-water-vapor/water-vapor-processes/evapotranspiration | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/precipitation/precipitation-profiles/latent-heat-flux | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biosphere/vegetation/vegetation-productivity | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:image | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[modality].local:modality:imaging | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[platform].gcmd_platform:noaa-21 | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |