MODIS-Aqua Daily Chlorophyll-a - OC-SMART AC
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keyword: daily
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language: EN
keyword: ocean color
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keyword: observation
was generated by: Activity
  started at time: 2002-07-04T12:00:00.000Z
  ended at time: 2022-12-31T12:00:00.999Z
keyword: aqua
description: The MODIS-Aqua daily Chlorophyll-a concentration (CHL, measured in mg·m-3) utilizes daily data from the MODIS sensor onboard NASA's Aqua satellite (MODIS-Aqua). This data has a nominal resolution of 1 km at nadir and is atmospherically corrected using the Ocean Color - Simultaneous Marine and Aerosol Retrieval Tool (OC-SMART) (FAN et al., 2021). The CHL estimates are obtained from daily MODIS-Aqua remote sensing reflectance via the Combination Of Neural Network models in Estimating Chlorophyll-a over Turbid and Clear Waters (CONNECT) (TRAN et al., 2025). The daily CHL products are the mosaic of several images of CHL estimates obtained for the same day and merged into daily composites utilizing the SNAP mosaicking tool.
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  agent: Organization
    has URL: https://data.inpe.br/big/
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keyword: surface
keyword: chlorophyll-a
keyword: brazil
keyword: modis
contact point: Organization
  has URL: https://oceancolor.gsfc.nasa.gov/
type: http://inspire.ec.europa.eu/metadata-codelist/ResourceType/series
temporal: PeriodOfTime
  start date: 2002-07-04T12:00:00.000Z
  end date: 2022-12-31T12:00:00.999Z
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modified: 2026-02-12T00:00:00.000Z
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keyword: chl

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

CatalogRecord
source: https://fedeo.ceos.org/collections/MODISA-OCSMART-CHL-DAILY-1
modified: 2026-02-12T14:04:15.979398Z
conforms to: https://joinup.ec.europa.eu/release/geodcat-ap/20

https://fedeo.ceos.org/collections/MODISA-OCSMART-CHL-DAILY-1
type: CatalogRecord
conforms to: ISO19139-2

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

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

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

EARTH SCIENCE>OCEANS>OCEAN OPTICS>OCEAN COLOR
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

EARTH SCIENCE>OCEANS>OCEAN OPTICS>CHLOROPHYLL>CHLOROPHYLL-A
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords