Table · dataset · 2025
VIIRS/NPP Actual and Potential Evapotranspiration Gap-Filled 8-Day L4 Global 500m SIN Grid V002
Listed in NASA Data Portal
The NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Actual and Potential Evapotranspiration product is a gap-filled 8-day composite dataset produced at 500 meter (m) pixel resolution.
Description
The VIIRS ET and PET algorithm is based on the Penman-Monteith equation, which includes inputs of daily meteorological reanalysis data along with VIIRS remotely sensed data products such as 8-day vegetation property dynamics and daily surface albedo.
The VNP16A2GF will be generated at the end of each year when the entire yearly 8-day VNP15A2H is available. Hence, the gap-filled VNP16A2GF is the improved VNP16A2, 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 VNP16A2GF in near-real time because it will be generated only at the end of a given year. Provided in the VNP16A2GF product are five variables for composited Evapotranspiration (ET), Latent Heat Flux (LE), Potential ET (PET) and Potential LE (PLE) along with a quality control variable. Two low resolution browse images, ET and LE, are also available for each VNP16A2GF granule.
The pixel values for the two Evapotranspiration variables (ET and PET) are the summation of 8-day total water loss within the composite period and the pixel values for the two Latent Heat variables (LE and PLE) are the average total energy over a unit area for a day during the composite period. Note that the last acquisition period of each year is a 5 or 6-day composite period, depending on the year.
Known Issues
* Please refer to the VIIRS Land Products website and MODIS/VIIRS Land Quality Assessment website for information about VNP16A2GF known issues.
Links
Get the data
- Resource landweb.modaps.eosdis.nasa.gov ↗
download · from data nasa gov
- PDF lpdaac.usgs.gov/documents/2254/VNP16_User_Guide_V1.pdf ↗
download · from data nasa gov
- Resource viirsland.gsfc.nasa.gov/Val_overview.html ↗
download · from data nasa gov
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C2872596186-LPCLOUD.iso19115 ↗
download · from data nasa gov
- Resource doi.org/10.5067/viirs/vnp16a2gf.002 ↗
download · DOI / persistent id · from data nasa gov
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/viirs-npp-actual-and-potential-evapotranspiration-gap-… ↗
landing page · from data nasa gov
Catalogue records · 1
- CKAN API data.nasa.gov/api/3/action/package_show?id=7ce25947-0301-4082-9769-cf6759e8a… ↗
metadata API · from data nasa gov
Topics
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
Provenance · 1 source records, 12 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Data Portal | 7ce25947-0301-4082-9769-cf6759e8ae4f | 10 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| 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[modality].local:modality:image | enrichment · data nasa gov | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[modality].local:modality:imaging | enrichment · data nasa gov | keyword-concept-rules@1.0.0 | title+description (75%) |
| created_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| description | source · data nasa gov | connector:data_nasa_gov@1.0.0 | /notes |
| license_text | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| publication_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| title | source · data nasa gov | connector:data_nasa_gov@1.0.0 | /title |
| updated_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 |