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/44190/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 44190,
    "uuid": "974b5a438e7847e39c492989d83b5858",
    "title": "WOEST: Radiosonde profiles from the Met Office Vaisala Sounding Station deployed from Larkhill, v1.1 (20230612-20230825)",
    "abstract": "Sonde profile measurements from the Met Office Vaisala Sounding Station deployed from Larkhill. These observations were taken as part of Wessex convection experiment - Observing the Evolving Structures of Turbulence (WOEST) between 20230612 and 20230825.\r\n\r\nData products from this deployment include: sonde profile pressure, temperature, relative humidity, wind speed and direction.\r\n\r\nFor further details of this deployment and the associated dataset please see the internal file metadata.\r\n\r\nThese data conform to the National Centre for Atmospheric Science (NCAS) data standards and are available under the UK Government Open Licence agreement. Acknowledgement of NCAS as the data provider is required whenever and wherever these data are used.",
    "keywords": "NCAS, observation measurements",
    "publicationState": "citable",
    "dataPublishedTime": "2025-05-08T08:35:31",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/44191/?format=api",
        "dataPath": "/badc/woest/data/radiosondes/larkhill/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 9722543,
        "numberOfFiles": 82,
        "fileFormat": "NetCDF"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/12352/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/4766/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/53939/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/53940/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58088/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/65555/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/66818/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/69859/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74110/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75857/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75915/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75916/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75917/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75918/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75919/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75920/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75921/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75922/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75923/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75924/?format=api"
    ],
    "dataLineage": "Data were processed and prepared by the project team before delivery to the Centre for Environmental Data Analysis (CEDA).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/13374/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/43720/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/43875/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/211283/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/211284/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/211288/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/211285/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/211286/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/211287/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/211289/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/211290/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/44192/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2522/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "registered",
            "accessRoles": null,
            "label": "registered: None group",
            "licenceURL": "http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": []
}