MODIS Terra Surface Reflectance 8-Day L3 Global 250m
type: Dataset
modified: 2026-08-08T00:00:00.000Z
keyword: DIF10
keyword: NASA
keyword: Satellite
keyword: Global
keyword: Imagery
keyword: Optical
keyword: Reflectance
keyword: Surface Reflectance
keyword: 250m
keyword: MOD09Q1
keyword: terra
keyword: modis
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  started at time: 2000-02-18T00:00:00.000Z
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description: The MODIS Terra MOD09Q1 Version 6.1 product provides atmospherically corrected Surface Reflectance for MODIS Bands 1 and 2 at 250 m spatial resolution. The reflectance values are corrected for atmospheric effects including gases, aerosols, and Rayleigh scattering. The dataset is generated as an 8-day composite, where for each pixel the most suitable observation is selected from all acquisitions within the compositing period based on criteria such as cloud conditions and solar zenith angle. When multiple observations satisfy these criteria, the pixel with the lowest value in Band 3 (blue) is selected. The product also includes two quality assurance layers that provide information about data quality and observation conditions.
temporal: PeriodOfTime
  start date: 2000-02-18T00:00:00.000Z

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

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

CatalogRecord
modified: 2026-08-08T01:00:54Z
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https://fedeo.ceos.org/collections/modis-terra-mod09q1
type: CatalogRecord
conforms to: ISO19139-2

EARTH SCIENCE>SPECTRAL/ENGINEERING>VISIBLE WAVELENGTHS
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

EARTH SCIENCE>CRYOSPHERE>SNOW/ICE>REFLECTANCE
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

EARTH SCIENCE>LAND SURFACE>SURFACE RADIATIVE PROPERTIES>REFLECTANCE
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

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

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