MODIS Aqua Gross Primary Productivity Gap-Filled 8-Day L4 Global 500m 2017-08
type: Dataset
keyword: MODIS
keyword: Aqua
keyword: NASA
keyword: Satellite
keyword: Global
keyword: Vegetation
keyword: GPP
keyword: Gross Primary Productivity
keyword: Carbon
keyword: 500m
keyword: MYD17A2HGF
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description: The MODIS Aqua MYD17A2HGF Version 6.1 product provides a gap-filled 8-day cumulative composite of Gross Primary Productivity (GPP) at 500 m spatial resolution. The dataset is based on the radiation use efficiency concept and can be used as input for models analyzing terrestrial energy balance, carbon and water cycles, and vegetation biogeochemistry. In addition to GPP, the product includes Net Photosynthesis (PSN), calculated as GPP minus Maintenance Respiration (MR), along with a quality control (QC) layer providing quality information for both variables. The gap-filled product is generated at the end of each year once the complete annual MYD15A2H LAI/FPAR dataset becomes available. Poor-quality LAI/FPAR inputs are identified using quality control flags and replaced through linear interpolation, improving the consistency of the final dataset. Consequently, the MYD17A2HGF product is not available in near-real time and is produced only after the completion of the full yearly dataset.
temporal: PeriodOfTime
  start date: 2017-08-01T00:00:00.000Z
  end date: 2017-08-31T23:59:59.999Z
license: other