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

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

MODIS Terra Surface Reflectance 8-Day L3 Global 250m
type: Dataset
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.
language: EN
modified: 2026-08-08T00:00:00.000Z
spatial: Location
  geometry: <gml:Envelope srsName="http://www.opengis.net/def/crs/OGC/1.3/CRS84"><gml:lowerCorner>-180.0 -90.0</gml:lowerCorner><gml:upperCorner>180.0 90.0</gml:upperCorner></gml:Envelope>
temporal: PeriodOfTime
  start date: 2000-02-18T00:00:00.000Z
type: http://inspire.ec.europa.eu/metadata-codelist/ResourceType/series
endpoint description: https://fedeo.ceos.org/collections/series/items/modis-terra-mod09q1/api
keyword: DIF10
keyword: modis
keyword: NASA
keyword: Global
keyword: Surface Reflectance
keyword: Satellite
keyword: Optical
keyword: Reflectance
keyword: Imagery
keyword: 250m
keyword: MOD09Q1
keyword: terra
qualified relation: Dublin Core metadata
  type: Relationship
  format: application/xml
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: ISO 19115-3 metadata
  type: Relationship
  format: application/vnd.iso.19115-3+xml
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: JSON-LD metadata
  type: Relationship
  format: application/ld+json
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: JSON-LD (GeoDCAT-AP) metadata
  type: Relationship
  format: application/ld+json;profile="http://data.europa.eu/930/"
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: Turtle (schema.org) metadata
  type: Relationship
  format: text/turtle;profile="https://schema.org"
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: OGC 17-084r1 metadata
  type: Relationship
  format: application/geo+json;profile="http://www.opengis.net/spec/eoc-geojson/1.0"
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: Atom format
  type: Relationship
  format: application/atom+xml
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: RDF/XML (schema.org) metadata
  type: Relationship
  format: application/rdf+xml;profile="https://schema.org"
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: HTML
  type: Relationship
  format: text/html
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: STAC metadata
  type: Relationship
  format: application/json
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: RDF/XML (GeoDCAT-AP) metadata
  type: Relationship
  format: application/rdf+xml;profile="http://data.europa.eu/930/"
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: JSON-LD (schema.org) metadata
  type: Relationship
  format: application/ld+json;profile="https://schema.org"
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: OGC 17-069r3 metadata
  type: Relationship
  format: application/geo+json;profile="http://www.opengis.net/spec/ogcapi-features-1/1.0"
  relation: MODIS Terra Surface Reflectance 8-Day L3 Global 250m
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: ISO 19139-2 metadata
  type: Relationship
  format: application/vnd.iso.19139-2+xml
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: DIF-10 metadata
  type: Relationship
  format: application/dif10+xml
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: RDF/XML metadata
  type: Relationship
  format: application/rdf+xml
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: ISO 19139 metadata
  type: Relationship
  format: application/vnd.iso.19139+xml
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
qualified relation: Turtle (GeoDCAT-AP) metadata
  type: Relationship
  format: text/turtle;profile="http://data.europa.eu/930/"
  relation: https://fedeo.ceos.org/collections/modis-terra-mod09q1
  had role: http://www.iana.org/assignments/relation/alternate
was generated by: Activity
  started at time: 2000-02-18T00:00:00.000Z

CatalogRecord
conforms to: https://joinup.ec.europa.eu/release/geodcat-ap/20
modified: 2026-08-08T01:00:54Z
source: https://fedeo.ceos.org/collections/modis-terra-mod09q1

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

https://fedeo.ceos.org/collections/modis-terra-mod09q1
type: CatalogRecord
conforms to: ISO19139-2

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

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

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