{
  "type": "Collection",
  "id": "8a8de3f9-2da7-4715-abbc-ef8d13a84c57_geo_aux_collection",
  "stac_version": "1.1.0",
  "description": "[Repository](../collection.json) > [8a8de3f9-2da7-4715-abbc-ef8d13a84c57](collection.json) > [Ground geometry](geo_collection.json) > Auxiliary data\n\n# The auxiliary data collection from run Auxiliary data\n\nThe **auxiliary data** contain product relative to LOS vectors, digital elevation models, lookup tables and temporal coherence.\n",
  "links": [
    {
      "rel": "root",
      "href": "../collection.json",
      "type": "application/json",
      "title": "GDM-SAR-In"
    },
    {
      "rel": "cite-as",
      "href": "https://flatsim.cnes.fr/doi/docs/NSBAS_Etna.pdf"
    },
    {
      "rel": "cite-as",
      "href": "https://proceedings.esa.int/files/116.pdf"
    },
    {
      "rel": "cite-as",
      "href": "https://www.mdpi.com/2072-4292/13/18/3734"
    },
    {
      "rel": "license",
      "href": "https://creativecommons.org/licenses/by-nc/4.0/"
    },
    {
      "rel": "item",
      "href": "./geo_aux_dem_item.json",
      "type": "application/json",
      "title": "Digital Elevation Model"
    },
    {
      "rel": "item",
      "href": "./geo_aux_tcoh_item.json",
      "type": "application/json",
      "title": "Temporal Coherence (Quality of measure)"
    },
    {
      "rel": "item",
      "href": "./geo_aux_cosenu_item.json",
      "type": "application/json",
      "title": "Map of LOS vector (ENU coefficient)"
    },
    {
      "rel": "item",
      "href": "./geo_aux_cosneu_item.json",
      "type": "application/json",
      "title": "Map of LOS vector (NEU coefficient)"
    },
    {
      "rel": "parent",
      "href": "./geo_collection.json",
      "type": "application/json",
      "title": "Ground geometry"
    }
  ],
  "stac_extensions": [
    "https://raw.githubusercontent.com/stac-extensions/processing/refs/heads/main/json-schema/schema.json",
    "https://raw.githubusercontent.com/stac-extensions/sar/refs/heads/main/json-schema/schema.json",
    "https://raw.githubusercontent.com/stac-extensions/sat/refs/heads/main/json-schema/schema.json"
  ],
  "uuid": "8a8de3f9-2da7-4715-abbc-ef8d13a84c57",
  "STAC hierarchy": {
    "0": {
      "title": "Repository",
      "href": "../collection.json"
    },
    "1": {
      "title": "8a8de3f9-2da7-4715-abbc-ef8d13a84c57",
      "href": "collection.json"
    },
    "2": {
      "title": "Ground geometry",
      "href": "geo_collection.json"
    },
    "3": {
      "title": "Auxiliary data",
      "href": null
    }
  },
  "ingestion_time": "2026-07-01T11:36:53.168740",
  "title": "Auxiliary data",
  "extent": {
    "spatial": {
      "bbox": [
        [
          54.6402817351855,
          -22.64291381359283,
          56.32643570184502,
          -19.27807293032762
        ]
      ]
    },
    "temporal": {
      "interval": [
        [
          "2025-04-17T05:33:04Z",
          "2025-04-17T05:33:04Z"
        ]
      ]
    }
  },
  "license": "CC-BY-NC-4.0",
  "keywords": [
    "GDM-SAR-In",
    "InSAR",
    "NSBAS processing chain",
    "auxiliary data",
    "ground geometry"
  ],
  "providers": [
    {
      "name": "ESA",
      "description": "The European Space Agency (ESA) is a 22-member intergovernmental body devoted to space exploration. With its headquarters in Paris and a staff of around 2,547 people globally as of 2023, the ESA was founded in 1975.",
      "roles": [
        "producer"
      ],
      "url": "https://www.esa.int/"
    },
    {
      "name": "OSUG",
      "description": "L'Observatoire des sciences de l'Univers de Grenoble (OSUG) est un observatoire des sciences de l'Univers (OSU) associé à l'Institut national des sciences de l'Univers (INSU) du CNRS et une école interne de l'université Grenoble-Alpes. Les OSU ont pour mission l’observation, la recherche, la formation et la diffusion des connaissances. L’OSUG œuvre dans tous les domaines des Sciences de l’Univers, de la planète Terre et de l’environnement.",
      "roles": [
        "processor",
        "licensor"
      ],
      "url": "https://www.osug.fr/"
    },
    {
      "name": "OPGC",
      "description": "L'Observatoire de physique du globe de Clermont-Ferrand (OPGC) est un observatoire des sciences de l'univers (OSU) dépendant du Centre national de la recherche scientifique (CNRS) et de l’université Clermont-Auvergne (UCA). Fondé en 1876 par Émile Alluard sous le nom d'Observatoire du Puy de Dôme, il s'est nommé l'Institut et observatoire de physique du globe (IOPG) de 1921 à 1985.",
      "roles": [
        "host"
      ],
      "url": "https://opgc.uca.fr/"
    }
  ],
  "summaries": {
    "instruments": [
      "c-sar"
    ],
    "constellation": [
      "sentinel-1"
    ],
    "mission": [
      null
    ],
    "sat:platform_international_designator": [
      "2014-016A"
    ],
    "sat:orbit_state": [
      "geostationary"
    ],
    "sar:frequency_band": [
      "C"
    ],
    "processing:level": [
      "L2"
    ],
    "keywords": [
      "Digital Elevation Model",
      "GDM-SAR-In",
      "InSAR",
      "NSBAS processing chain",
      "auxiliary data",
      "digital elevation model",
      "geostationary",
      "ground geometry",
      "resolution_4looks",
      "temporal coherence",
      "ENU",
      "EPOS convention",
      "Map of LOS vector",
      "resolution_8looks",
      "FlatSIM convention",
      "NEU"
    ],
    "updated": {
      "minimum": "2025-04-17T05:33:04Z",
      "maximum": "2025-04-17T05:33:04Z"
    },
    "created": {
      "minimum": "2025-04-12T10:33:21Z",
      "maximum": "2025-04-12T10:47:34Z"
    },
    "sar:center_frequency": {
      "minimum": 5.405,
      "maximum": 5.405
    }
  },
  "assets": {
    "documentation": {
      "href": "https://formater.pages.in2p3.fr/flatsim/product.html",
      "type": "text/html",
      "title": "Product description (general for NSBAS, including GDM-SAR-In and FLATSIM)",
      "description": "Documentation page describing the product names and acronyms, information about the generation of the products, and metadata definitions.",
      "roles": [
        "metadata"
      ]
    },
    "download_tool": {
      "href": "https://isdeform.opgc.fr/download/GDMSARIn/8a8de3f9-2da7-4715-abbc-ef8d13a84c57",
      "type": "text/html",
      "title": "Download tool",
      "roles": [
        "metadata"
      ]
    }
  }
}