Get a list of Observation objects.

### Available end points:

- `/observations/` - Will list all Results in the database
- `/observations.json` - Will return all Results in json format. This can
also be achieved by using the accept header. `application/json`
- `/observations/<object_id>/` - Returns Results object with that id

### Available Methods:

- `GET`
- `HEAD`

### Available filters:

- `title`
- `uuid`
- `keywords`
- `status`
- `result_field`
- `discoveryKeywords`
- `updateFrequency`
- `nonGeographicFlag`
- `publicationState`
- `permissions`

### How to use filters:

These filters can be used like django query filters using __ for related model relationships.

- `/observations/?uuid=d594d53df2612bbd89c2e0e770b5c1a0`
- `/observations/?status=completed`
- `/observations/?results_field__dataPath__startswith=/neodc/esacci`
- `/observations/?discoveryKeywords__name=ESACCI`
- `/observations/?nonGeographicFlag=True`

Filters can be stacked to build an 'AND' relationship. E.g.

- `/observations/?publicationState__in=published,citable&nonGeographicFlag=True`
- `/observations/?publicationState__in=published,citable&discoveryKeyword__name=NDGO0003`

GET /api/v2/observations/37276/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 37276,
    "uuid": "48cd535e93574c8da8e80b91e06c7d51",
    "title": "ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Greenland Gravimetric Mass Balance from GRACE data, derived by DTU Space, v2.2",
    "abstract": "This dataset provides a Gravimetric Mass Balance (GMB) product for the Greenland Ice Sheet (GIS), generated by DTU Space, based on monthly snapshots of the Earth’s gravity field provided by the Gravity Recovery and Climate Experiment (GRACE) and its follow-on satellite mission (GRACE-FO). The product relies on monthly gravity field solutions (L2) of release 06 generated at the Center for Space Research (University of Texas at Austin) and spans the period from April 2002 through August 2021.\r\n\r\nThe GMB product covers the full GRACE mission period (April 2002 - June 2017) and is extended by means of GRACE-FO data starting from June 2018, thus including 200 monthly solutions. The mass change estimation is based on inversion method developed at DTU Space.\r\n\r\nTwo different types of products are available. First, the  gridded mass trends product is comprised of ice mass change trends for cells of equal area with 50 km resolution covering the whole GIS. Second, the mass change time series product provides time series of integrated mass changes for 8 drainage basins and the entire GIS.\r\n\r\nReference:\r\nBarletta, V. R., Sørensen, L. S., and Forsberg, R. (2013) 'Scatter of mass changes estimates at basin scale for Greenland and Antarctica', The Cryosphere, 7, 1411-1432, doi:10.5194/tc-7-1411-2013.\",",
    "keywords": "Greenland Ice Sheet, CCI, ESA, Gravimetric Mass Balance",
    "publicationState": "citable",
    "dataPublishedTime": "2025-04-03T14:50:57",
    "doiPublishedTime": "2025-04-28T07:47:13",
    "updateFrequency": "",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/41691/?format=api",
        "dataPath": "/neodc/esacci/ice_sheets_greenland/data/greenland_gravimetric_mass_balance/DTU_Space/v2.2",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 60771838,
        "numberOfFiles": 54,
        "fileFormat": "netcdf, dat, txt, png"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/10296/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/4549/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50542/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50543/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/55882/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/80393/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/80394/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/80395/?format=api"
    ],
    "dataLineage": "Data have been produced by DTU Space within the ESA Greenland Ice Sheet CCI project, and the original version is stored at data.dtu.dk  https://doi.org/10.11583/DTU.12866579\r\n\r\nA copy of the data has been supplied to the Centre for Environmental Data Analysis (CEDA) for the CCI Open Data Portal.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/13205/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/13324/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/14317/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/14316/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178109/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178110/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178111/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178112/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178114/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178115/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178118/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178119/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178120/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178116/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/178117/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": "https://api.catalogue.ceda.ac.uk/api/v2/composites/37279/?format=api",
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2553/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_icesheets_greenland_terms_and_conditions.pdf",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1140,
            "name": "ESACCI"
        }
    ]
}