@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix gsp: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.amerigeoss.org/dataset/4b0255ca-8589-4a2f-965f-05b3e9a4b2ab> a dcat:Dataset ;
    dct:description "This dataset consists of ground-based Global Navigation Satellite System (GNSS) Observation Data (30-second sampling, daily 24 hour files) from the NASA Crustal Dynamics Data Information System (CDDIS). GNSS provide autonomous geo-spatial positioning with global coverage. GNSS data sets from ground receivers at the CDDIS consist primarily of the data from the U.S. Global Positioning System (GPS) and the Russian GLObal NAvigation Satellite System (GLONASS). Since 2011, the CDDIS GNSS archive includes data from other GNSS (Europe’s Galileo, China’s Beidou, Japan’s Quasi-Zenith Satellite System/QZSS, the Indian Regional Navigation Satellite System/IRNSS, and worldwide Satellite Based Augmentation Systems/SBASs), which are similar to the U.S. GPS in terms of the satellite constellation, orbits, and signal structure. The daily GNSS observation files (un-compacted) contain one day of GPS or multi-GNSS observation (30-second sampling) data in RINEX format from a global permanent network of ground-based receivers, one file per site. More information about these data is available on the CDDIS website at https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/daily_30second_data.html." ;
    dct:identifier "C1406818946-CDDIS" ;
    dct:issued "1992-01-01"^^xsd:date ;
    dct:language "{en-US}" ;
    dct:modified "2020-10-28"^^xsd:date ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-180.0000 -90.0000, 180.0000 -90.0000, 180.0000 90.0000, -180.0000 90.0000, -180.0000 -90.0000))"^^gsp:wktLiteral ] ;
    dct:title "Ground-Based Global Navigation Satellite System (GNSS) Observation Data (30-second sampling, daily, 24 hour files) from NASA CDDIS" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "undefined" ;
            vcard:hasEmail <mailto:support-cddis@earthdata.nasa.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/4b0255ca-8589-4a2f-965f-05b3e9a4b2ab/resource/097a41e7-7dcd-4a7a-8690-e389cf266890>,
        <https://data.amerigeoss.org/dataset/4b0255ca-8589-4a2f-965f-05b3e9a4b2ab/resource/5053ddad-e8a3-453e-8c32-55cd9a831775>,
        <https://data.amerigeoss.org/dataset/4b0255ca-8589-4a2f-965f-05b3e9a4b2ab/resource/7a5d6c39-6794-4aab-9a01-0031e7fea072>,
        <https://data.amerigeoss.org/dataset/4b0255ca-8589-4a2f-965f-05b3e9a4b2ab/resource/cc5de9c7-3bd3-4116-af41-4080887491a5> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "ckan",
        "earth-science",
        "geo",
        "geodetics",
        "geoss",
        "gravity-gravitational-field",
        "national",
        "north-america",
        "solid-earth",
        "tectonics",
        "united-states" ;
    dcat:theme <%7BIGS>,
        <geospatial%7D> .

<https://data.amerigeoss.org/dataset/4b0255ca-8589-4a2f-965f-05b3e9a4b2ab/resource/097a41e7-7dcd-4a7a-8690-e389cf266890> a dcat:Distribution ;
    dct:description "URL for retrieval of GNSS daily observation data through ftp" ;
    dct:format "HTML" ;
    dct:issued "2020-11-12T04:10:45.171542"^^xsd:dateTime ;
    dct:modified "2025-11-21T12:25:57.594317"^^xsd:dateTime ;
    dct:title "Download this dataset" ;
    dcat:accessURL <ftp://cddis.nasa.gov/gnss/data/daily> ;
    dcat:mediaType "text/html" .

<https://data.amerigeoss.org/dataset/4b0255ca-8589-4a2f-965f-05b3e9a4b2ab/resource/5053ddad-e8a3-453e-8c32-55cd9a831775> a dcat:Distribution ;
    dct:description "URL for more information about GNSS daily observation data" ;
    dct:format "HTML" ;
    dct:issued "2020-11-12T04:10:45.171553"^^xsd:dateTime ;
    dct:modified "2025-11-21T12:25:57.595105"^^xsd:dateTime ;
    dct:title "This dataset's landing page" ;
    dcat:accessURL <http://dx.doi.org/10.5067/GNSS/GNSS_DAILY_O_001> ;
    dcat:mediaType "text/html" .

<https://data.amerigeoss.org/dataset/4b0255ca-8589-4a2f-965f-05b3e9a4b2ab/resource/7a5d6c39-6794-4aab-9a01-0031e7fea072> a dcat:Distribution ;
    dct:description "URL for more information about GNSS daily observation data" ;
    dct:format "HTML" ;
    dct:issued "2020-11-12T04:10:45.171548"^^xsd:dateTime ;
    dct:modified "2025-11-21T12:25:57.594721"^^xsd:dateTime ;
    dct:title "View documentation related to this dataset" ;
    dcat:accessURL <https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/daily_30second_data.html> ;
    dcat:mediaType "text/html" .

<https://data.amerigeoss.org/dataset/4b0255ca-8589-4a2f-965f-05b3e9a4b2ab/resource/cc5de9c7-3bd3-4116-af41-4080887491a5> a dcat:Distribution ;
    dct:description "Search results for publications that cite this dataset by its DOI." ;
    dct:format "HTML" ;
    dct:issued "2020-11-12T04:10:45.171533"^^xsd:dateTime ;
    dct:modified "2025-11-21T12:25:57.593887"^^xsd:dateTime ;
    dct:title "Google Scholar search results" ;
    dcat:accessURL <https://scholar.google.com/scholar?q=10.5067%2FGNSS%2FGNSS_DAILY_O_001> ;
    dcat:mediaType "text/html" .

<https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> a foaf:Agent ;
    foaf:name "US Migrating" .