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Description
The MOD17A2H Version 6.1 Gross Primary Productivity (GPP) product is a cumulative 8-day composite of values with 500 meter (m) pixel size based on the radiation use efficiency concept that can be potentially used as inputs to data models to calculate terrestrial energy, carbon, water cycle processes, and biogeochemistry of vegetation. The data product includes information about GPP and Net Photosynthesis (PSN). The PSN band values are the GPP less the Maintenance Respiration (MR). The data product also contains a PSN Quality Control (QC) layer. The quality layer contains quality information for both the GPP and the PSN.
The following changes and improvements were implemented for inputs to MODIS Version 6.1 GPP data products: (1) Version 6.1 Level-1B (L1B) products have been improved by undergoing various calibration changes that include: changes to the response-versus-scan angle (RVS) approach that affects reflectance bands for Aqua and Terra MODIS, corrections to adjust for the optical crosstalk in Terra MODIS infrared (IR) bands, and corrections to the Terra MODIS forward look-up table (LUT) update for the period 2012 – 2017, (2) A polarization correction has been applied to the L1B Reflective Solar Bands (RSB), and (3) The product uses Climatology Leaf Area Index (LAI) and Fraction of Photosynthetically Active Radiation (FPAR) as back up to the operational LAI/FPAR.
Land Processes Distributed Active Archive Center (LP DAAC)
,
MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/MODAPS)
Concept ID
C2565791027-LPCLOUD
Data State
ACTIVE
Number of Files/Granules
88283
Processing Level
4
Published
Updated
Science Keywords
Photosynthesis
,
Primary Production
,
Vegetation Productivity
Citation
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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Citation Copied
Running, S., Mu, Q., & Zhao, M. (2021). MODIS/Terra Gross Primary Productivity 8-Day L4 Global 500m SIN Grid V061 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD17A2H.061 Date Accessed: 2026-05-20
Running, Steve, Qiaozhen Mu, and Maosheng Zhao. “MODIS/Terra Gross Primary Productivity 8-Day L4 Global 500m SIN Grid V061.” NASA Land Processes Distributed Active Archive Center, 2021. doi:10.5067/MODIS/MOD17A2H.061. Date Accessed: 2026-05-20
Running, Steve, et al. MODIS/Terra Gross Primary Productivity 8-Day L4 Global 500m SIN Grid V061. NASA Land Processes Distributed Active Archive Center, 2021, doi:10.5067/MODIS/MOD17A2H.061. Date Accessed: 2026-05-20
File Naming Convention
MOD17A2H.A2025209.h05v11.061.2025218043205.hdf
The file name begins with the Product Short Name (MOD17A2H) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2025209), the Tile Identifier which is horizontal tile and vertical tile provided as hXXvYY (h05v11), the Version of the data collection (061), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2025218043205), and the Data Format (hdf).