Observation Instance – Django REST framework

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/43429/?format=api

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 43429,
    "uuid": "7d44ef2a9e9346e79863f53193db189e",
    "title": "UK Air Quality Reanalysis (AQREAN): Bias Corrected Surface Level",
    "abstract": "The UK Air Quality Reanalysis (AQREAN) combines an air quality forecast model with a bias-correction post-processing system, incorporating ground-based pollutant observations, to give an improved estimate of pollutant levels for the UK. \r\n\r\nThe data covers the UK at the surface level on a 0.1degree horizontal grid, at hourly time resolution. \r\n\r\nThis dataset contains the following species:\r\n\t• Particulate matter, with diameter < 2.5 µm (PM2.5)\r\n\t• Particulate matter, with diameter < 10 µm (PM10)\r\n\t• Ozone (O3)\r\n\t• Nitrogen Monoxide (NO)\r\n\t• Nitrogen Dioxide (NO2)\r\n\t• Sulphur Dioxide (SO2)\r\n\t• Carbon Monoxide (CO)\r\n\r\nThe Daily Air Quality Index (DAQI) is also included, along with the species-specific DAQI for the contributing pollutants. \r\n\r\nNote: \r\n• AQREAN is only representative of ambient background pollutant concentrations. \r\n• Data is masked to include only land-based locations as no observations are included to support the bias corrections over the ocean.",
    "keywords": "SPF,Clean Air,Met Office,Air Quality,UK,Reanalysis",
    "publicationState": "published",
    "dataPublishedTime": "2025-03-05T12:08:10",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "ongoing",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/43548/?format=api",
        "dataPath": "/badc/deposited2025/AQREAN",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 52620806507,
        "numberOfFiles": 225,
        "fileFormat": "NetCDF"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/12077/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/4673/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/6023/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9042/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9043/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/19043/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/51186/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/51187/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62353/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74897/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74898/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74899/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74900/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74901/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74902/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74903/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74904/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74905/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74906/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/80046/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/80047/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/80048/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/80049/?format=api"
    ],
    "dataLineage": "Data were collected and processed by the project team at the Met Office and submitted to the Centre for Environmental Data Analysis (CEDA).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/43430/?format=api"
    ],
    "observationcollection_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/207955/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/206725/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/206726/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/206727/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/206728/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/206729/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/207123/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/206724/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/207124/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/207125/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/207126/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/207127/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/5706/?format=api",
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2526/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": []
}