MODIS Terra Net Primary Production Gap-Filled Yearly L4 Global 500m
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keyword: Vegetation
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keyword: modis
temporal: PeriodOfTime
  start date: 2001-01-01T00:00:00.000Z
description: The MODIS Terra MOD17A3HGF Version 6.1 product provides annual estimates of Gross Primary Productivity (GPP) and Net Primary Productivity (NPP) at 500 m spatial resolution. The dataset is generated by summing all 8-day GPP and Net Photosynthesis (PSN) values from the MOD17A2H product over a given year, where PSN is calculated as GPP minus Maintenance Respiration (MR). The gap-filled product is produced at the end of each year once the complete annual MOD15A2H LAI/FPAR dataset becomes available. Poor-quality LAI/FPAR inputs are identified using quality control flags and replaced through linear interpolation to improve data consistency. Because of this processing approach, the dataset is not available in near-real time and is released only after the full yearly dataset has been completed.
keyword: 500m
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keyword: terra
keyword: NASA
keyword: Carbon
keyword: Satellite
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keyword: NPP
was generated by: Activity
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keyword: DIF10
keyword: Global
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modified: 2026-08-08T00:00:00.000Z
keyword: GPP
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keyword: MOD17A3HGF

MODIS
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments

Terra
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms

EARTH SCIENCE>BIOSPHERE>VEGETATION
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

EARTH SCIENCE>AGRICULTURE>SOILS>CARBON
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

CatalogRecord
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modified: 2026-08-08T01:00:59Z
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https://fedeo.ceos.org/collections/modis-terra-mod17a3hgf
type: CatalogRecord
conforms to: ISO19139-2

TERRA
type: Entity
in scheme: https://earth.esa.int/concepts/concept_scheme/platforms
type: Concept

MODIS
type: Entity
in scheme: https://earth.esa.int/concepts/concept_scheme/instruments
type: Concept