VIIRS/JPSS1 Photosynthetically Active Radiation Daily L3 Global 1km SIN Grid V002

The NOAA-20 Visible Infrared Imaging Radiometer Suite (VIIRS) Photosynthetically Active Radiation (PAR) gridded Level 3 product is produced at 1 kilometer pixel resolution at daily intervals. PAR is the incident solar radiation in the visible spectrum (400-700 nanometers) and is a significant variable in land surface models (LSMs), receiving increased attention due to its importance for the management and operation of solar energy systems.

The VJ118 algorithm adapts the narrowband look-up table (LUT) approach to estimate PAR. The LUTs consider different types of loadings of aerosols and clouds at a variety of illumination/viewing geometry. The Algorithm Theoretical Basis Document (ATBD) is forthcoming and will provide additional details regarding the methodology used to create the data.

Provided in the VJ118A2 product are variables for instantaneous total, direct, and diffuse PAR, as well as 3-hour PAR, daily mean PAR, and a quality variable.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated June 23, 2026, 01:42 (UTC)
Created June 3, 2026, 00:32 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 3d98360f-ac31-4dcb-a82f-1f83f4cc9d83
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.5067/VIIRS/VJ118A2.002
license https://www.usa.gov/government-works
modified 2026-06-15T22:16:01Z
programCode {026:000}
publisher LP DAAC;NASA/GSFC/SED/ESD/TISL/LandSIPS
resource-type Dataset
source_datajson_identifier true
source_hash dd7261bf832627c0b3e726b1e72a57e8f201ebea83e6d673b037887cf9ffc526
source_schema_version 1.1
spatial ["CARTESIAN", [{"NorthBoundingCoordinate": 90, "WestBoundingCoordinate": -180, "EastBoundingCoordinate": 180, "SouthBoundingCoordinate": -90}]]
temporal 2018-01-05/2026-06-15
theme {"Earth Science"}