@prefix void:  <http://rdfs.org/ns/void#> .
@prefix os:    <http://a9.com/-/spec/opensearch/1.1/> .
@prefix adms:  <http://www.w3.org/ns/adms#> .
@prefix owl:   <http://www.w3.org/2002/07/owl#> .
@prefix gsp:   <http://www.opengis.net/ont/geosparql#> .
@prefix xsd:   <http://www.w3.org/2001/XMLSchema#> .
@prefix skos:  <http://www.w3.org/2004/02/skos/core#> .
@prefix eo:    <http://a9.com/-/opensearch/extensions/eo/1.0/> .
@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix geo:   <http://a9.com/-/opensearch/extensions/geo/1.0/> .
@prefix dct:   <http://purl.org/dc/terms/> .
@prefix sru:   <http://a9.com/-/opensearch/extensions/sru/2.0/> .
@prefix ldp:   <http://www.w3.org/ns/ldp#> .
@prefix owc:   <http://www.opengis.net/ont/owc/1.0/> .
@prefix iana:  <http://www.iana.org/assignments/relation/> .
@prefix time:  <http://a9.com/-/opensearch/extensions/time/1.0/> .
@prefix locn:  <http://www.w3.org/ns/locn#> .
@prefix atom:  <http://www.w3.org/2005/Atom/> .
@prefix dcat:  <http://www.w3.org/ns/dcat#> .
@prefix prov:  <http://www.w3.org/ns/prov#> .
@prefix foaf:  <http://xmlns.com/foaf/0.1/> .
@prefix dc:    <http://purl.org/dc/elements/1.1/> .

<https://earth.esa.int/concept/3f5f208d-5d56-563a-9005-d3667b1b66f7>
        a               prov:Entity , skos:Concept ;
        dct:title       "Sentinel-1" ;
        skos:inScheme   "https://earth.esa.int/concepts/concept_scheme/platforms" ;
        skos:prefLabel  "Sentinel-1" .

<https://gcmd.earthdata.nasa.gov/kms/concept/625da982-3648-43fc-a640-1b230509944e>
        a               skos:Concept ;
        skos:inScheme   "https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords" ;
        skos:prefLabel  "EARTH SCIENCE>SPECTRAL/ENGINEERING>RADAR>RADAR BACKSCATTER" .

<https://gcmd.earthdata.nasa.gov/kms/concept/007c3084-89db-458e-8387-14e192b6cb8e>
        a               skos:Concept ;
        skos:inScheme   "https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms" ;
        skos:prefLabel  "Sentinel-1" .

<https://gcmd.earthdata.nasa.gov/kms/concept/d3b7c3c0-e644-4f01-94da-dfebe854c0d1>
        a               skos:Concept ;
        skos:inScheme   "https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords" ;
        skos:prefLabel  "EARTH SCIENCE>SPECTRAL/ENGINEERING>RADAR" .

<https://gcmd.earthdata.nasa.gov/kms/concept/199e3af8-4cf3-48ba-8b28-b9b54756b3db>
        a               skos:Concept ;
        skos:inScheme   "https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords" ;
        skos:prefLabel  "EARTH SCIENCE>AGRICULTURE>SOILS" .

<https://gcmd.earthdata.nasa.gov/kms/concept/c7279e54-f7c1-4ee7-a957-719d6021a3f6>
        a               skos:Concept ;
        skos:inScheme   "https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms" ;
        skos:prefLabel  "Sentinel-1A" .

<https://gcmd.earthdata.nasa.gov/kms/concept/ed400e7c-229e-48be-9a93-84f2fc864448>
        a               skos:Concept ;
        skos:inScheme   "https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments" ;
        skos:prefLabel  "C-SAR" .

<https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1>
        a                          dcat:Dataset ;
        dct:description            "The Sigma0 product describes how much of the radar signal that was sent out by Sentinel-1 is reflected back to the sensor, and depends on the characteristics of the surface. This product is derived from the L1-GRD product. Typical SAR data processing, which produces level 1 images such as L1-GRD product, does not include radiometric corrections and significant radiometric bias remains. Therefore, it is necessary to apply the radiometric correction to SAR images so that the pixel values of the SAR images truly represent the radar backscatter of the reflecting surface. The radiometric correction is also necessary for the comparison of SAR images acquired with different sensors, or acquired from the same sensor but at different times, in different modes, or processed by different processors. For this Sigma0 product, radiometric calibration was performed using a specific Look Up Table (LUT) that is provided with each original GRD product. This LUT applies a range-dependent gain including the absolute calibration constant, in addition to a constant offset. Next to calibration, also orbit correction, border noise removal, thermal noise removal, and range doppler terrain correction steps were applied during production of Sigma0. The terrain correction step is intended to compensate for distortions due to topographical variations of the scene and the tilt of the satellite sensor, so that the geometric representation of the image will be as close as possible to the real world. The Level1 GRD product can be useful for Land monitoring and Emergency management." ;
        dct:identifier             "terrascope-s1-grd-sigma0-v1" ;
        dct:language               <http://publications.europa.eu/resource/authority/language/EN> ;
        dct:modified               "2026-06-10T00:00:00.000Z" ;
        dct:spatial                [ a              dct:Location ;
                                     locn:geometry  "<gml:Envelope srsName=\"http://www.opengis.net/def/crs/OGC/1.3/CRS84\"><gml:lowerCorner>-180.0 -84.0</gml:lowerCorner><gml:upperCorner>180.0 84.0</gml:upperCorner></gml:Envelope>"^^gsp:gmlLiteral , "POLYGON((-180.0 -84.0,180.0 -84.0,180.0 84.0,-180.0 84.0,-180.0 -84.0))"^^gsp:wktLiteral , "{\"type\":\"Polygon\",\"coordinates\":[[[-180,-84],[180,-84],[180,84],[-180,84],[-180,-84]]] }"^^gsp:geoJSONLiteral
                                   ] ;
        dct:temporal               [ a               dct:PeriodOfTime ;
                                     dcat:startDate  "2014-10-23T00:00:00Z"^^xsd:date
                                   ] ;
        dct:title                  "Sentinel-1 Level-1 Ground Range Detected (GRD) SIGMA0 products" ;
        dct:type                   "http://inspire.ec.europa.eu/metadata-codelist/ResourceType/series" ;
        dcat:contactPoint          [ a              vcard:Organization ;
                                     vcard:hasName  "ESA/ESRIN"@en ;
                                     vcard:hasURL   <https://earth.esa.int/>
                                   ] ;
        dcat:endpointDescription   "https://fedeo.ceos.org/collections/series/items/terrascope-s1-grd-sigma0-v1/api" ;
        dcat:keyword               "sentinel-1" , "radar" , "radar backscatter" , "sentinel-1b" , "sentinel-1c" , "esa" , "ground" , "sar" , "sentinel-1a" , "terrascope" , "copernicus" , "level-3" , "orthoimagery" , "sentinel" , "c-sar" , "DIF10" , "vito" ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/dif10+xml"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/dif10%2Bxml" ;
                                     dct:title     "DIF-10 metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/vnd.iso.19139+xml"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/vnd.iso.19139%2Bxml" ;
                                     dct:title     "ISO 19139 metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/rdf+xml;profile=\"https://schema.org\""
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/rdf%2Bxml;profile=https://schema.org" ;
                                     dct:title     "RDF/XML (schema.org) metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "text/turtle;profile=\"http://data.europa.eu/930/\""
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=text/turtle;profile=http://data.europa.eu/930/" ;
                                     dct:title     "Turtle (GeoDCAT-AP) metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/ld+json;profile=\"http://data.europa.eu/930/\""
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/ld%2Bjson;profile=http://data.europa.eu/930/" ;
                                     dct:title     "JSON-LD (GeoDCAT-AP) metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/json"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/json" ;
                                     dct:title     "STAC metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/rdf+xml"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/rdf%2Bxml" ;
                                     dct:title     "RDF/XML metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/vnd.iso.19115-3+xml"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/vnd.iso.19115-3%2Bxml" ;
                                     dct:title     "ISO 19115-3 metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/rdf+xml;profile=\"http://data.europa.eu/930/\""
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/rdf%2Bxml;profile=http://data.europa.eu/930/" ;
                                     dct:title     "RDF/XML (GeoDCAT-AP) metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/ld+json;profile=\"https://schema.org\""
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/ld%2Bjson;profile=https://schema.org" ;
                                     dct:title     "JSON-LD (schema.org) metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "text/turtle;profile=\"https://schema.org\""
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=text/turtle;profile=https://schema.org" ;
                                     dct:title     "Turtle (schema.org) metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/ld+json"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/ld%2Bjson" ;
                                     dct:title     "JSON-LD metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/atom+xml"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/atom%2Bxml" ;
                                     dct:title     "Atom format" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/geo+json;profile=\"http://www.opengis.net/spec/ogcapi-features-1/1.0\""
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1" ;
                                     dct:title     "OGC 17-069r3 metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/xml"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/xml" ;
                                     dct:title     "Dublin Core metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/vnd.iso.19139-2+xml"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/vnd.iso.19139-2%2Bxml" ;
                                     dct:title     "ISO 19139-2 metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "text/html"
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=text/html" ;
                                     dct:title     "HTML" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:qualifiedRelation     [ a             dcat:Relationship ;
                                     dct:format    [ a           dct:MediaType ;
                                                     rdfs:label  "application/geo+json;profile=\"http://www.opengis.net/spec/eoc-geojson/1.0\""
                                                   ] ;
                                     dct:relation  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?mode=owc" ;
                                     dct:title     "OGC 17-084r1 metadata" ;
                                     dcat:hadRole  "http://www.iana.org/assignments/relation/alternate"
                                   ] ;
        dcat:theme                 <https://gcmd.earthdata.nasa.gov/kms/concept/007c3084-89db-458e-8387-14e192b6cb8e> , <https://gcmd.earthdata.nasa.gov/kms/concept/c7279e54-f7c1-4ee7-a957-719d6021a3f6> , <https://gcmd.earthdata.nasa.gov/kms/concept/d3b7c3c0-e644-4f01-94da-dfebe854c0d1> , <https://gcmd.earthdata.nasa.gov/kms/concept/ed400e7c-229e-48be-9a93-84f2fc864448> , <https://earth.esa.int/concept/a2cb7dbe-6433-5737-9d3c-b974e6f643b2> , <https://gcmd.earthdata.nasa.gov/kms/concept/199e3af8-4cf3-48ba-8b28-b9b54756b3db> , <https://earth.esa.int/concept/d9a8ec2e-1269-5292-aae6-dd1db28fa371> , <https://earth.esa.int/concept/584f4060-c92c-52be-bd56-b077fc729ded> , <https://gcmd.earthdata.nasa.gov/kms/concept/9940dbad-1a9a-4858-a0e8-af35b21277e2> , <https://gcmd.earthdata.nasa.gov/kms/concept/625da982-3648-43fc-a640-1b230509944e> , <https://earth.esa.int/concept/3f5f208d-5d56-563a-9005-d3667b1b66f7> ;
        prov:qualifiedAttribution  [ a             prov:Attribution ;
                                     dcat:hadRole  <http://inspire.ec.europa.eu/metadata-codelist/ResponsiblePartyRole/processor> ;
                                     prov:agent    [ a              vcard:Organization ;
                                                     vcard:hasName  "VITO"@en ;
                                                     vcard:hasURL   <https://terrascope.be/>
                                                   ]
                                   ] ;
        prov:wasGeneratedBy        [ a                   prov:Activity ;
                                     prov:startedAtTime  "2014-10-23T00:00:00Z" ;
                                     prov:used           <https://earth.esa.int/concept/d9a8ec2e-1269-5292-aae6-dd1db28fa371> , <https://earth.esa.int/concept/a2cb7dbe-6433-5737-9d3c-b974e6f643b2>
                                   ] ;
        prov:wasGeneratedBy        [ a                   prov:Activity ;
                                     prov:startedAtTime  "2014-10-23T00:00:00Z" ;
                                     prov:used           [ a          prov:Entity ;
                                                           dct:title  "Sentinel-1C"
                                                         ]
                                   ] ;
        prov:wasGeneratedBy        [ a                   prov:Activity ;
                                     prov:startedAtTime  "2014-10-23T00:00:00Z" ;
                                     prov:used           <https://earth.esa.int/concept/3f5f208d-5d56-563a-9005-d3667b1b66f7> , <https://earth.esa.int/concept/a2cb7dbe-6433-5737-9d3c-b974e6f643b2>
                                   ] ;
        prov:wasGeneratedBy        [ a                   prov:Activity ;
                                     prov:startedAtTime  "2014-10-23T00:00:00Z" ;
                                     prov:used           <https://earth.esa.int/concept/584f4060-c92c-52be-bd56-b077fc729ded> , <https://earth.esa.int/concept/a2cb7dbe-6433-5737-9d3c-b974e6f643b2>
                                   ] ;
        foaf:isPrimaryTopicOf      [ a               dcat:CatalogRecord ;
                                     dct:conformsTo  "https://joinup.ec.europa.eu/release/geodcat-ap/20" ;
                                     dct:identifier  "https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1" ;
                                     dct:modified    "2026-06-10T01:10:47Z" ;
                                     dct:source      <https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/vnd.iso.19139-2%2Bxml>
                                   ] .

<https://earth.esa.int/concept/d9a8ec2e-1269-5292-aae6-dd1db28fa371>
        a               prov:Entity , skos:Concept ;
        dct:title       "Sentinel-1B" ;
        skos:inScheme   "https://earth.esa.int/concepts/concept_scheme/platforms" ;
        skos:prefLabel  "Sentinel-1B" .

<https://fedeo.ceos.org/collections/terrascope-s1-grd-sigma0-v1?httpAccept=application/vnd.iso.19139-2%2Bxml>
        a               dcat:CatalogRecord ;
        dct:conformsTo  [ a          dct:Standard ;
                          dct:title  "ISO19139-2"
                        ] .

<https://earth.esa.int/concept/a2cb7dbe-6433-5737-9d3c-b974e6f643b2>
        a               prov:Entity , skos:Concept ;
        dct:title       "C-SAR" ;
        skos:inScheme   "https://earth.esa.int/concepts/concept_scheme/instruments" ;
        skos:prefLabel  "C-SAR" .

<https://earth.esa.int/concept/584f4060-c92c-52be-bd56-b077fc729ded>
        a               prov:Entity , skos:Concept ;
        dct:title       "Sentinel-1A" ;
        skos:inScheme   "https://earth.esa.int/concepts/concept_scheme/platforms" ;
        skos:prefLabel  "Sentinel-1A" .

<https://gcmd.earthdata.nasa.gov/kms/concept/9940dbad-1a9a-4858-a0e8-af35b21277e2>
        a               skos:Concept ;
        skos:inScheme   "https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms" ;
        skos:prefLabel  "Sentinel-1B" .