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/45914/?format=api

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

{
    "ob_id": 45914,
    "uuid": "ef40ee0e4d4c4a208cc81b4a24902631",
    "title": "TEAMx: Multi-scale transport and exchange processes in the atmosphere over mountains – programme and experiment: birdbath and vol scans from the NCAS X-Band Mobile Radar unit 2 deployed at Mount Plose, South Tyrol, Italy, v1.0.0 (20250618-20250915)",
    "abstract": "Vertical calibration (birdbath) and volume scan measurements from the NCAS X-Band Mobile Radar unit 2 deployed at Mount Plose, South Tyrol, Italy. These observations were taken as part of TEAMx: Multi-scale transport and exchange processes in the atmosphere over mountains – programme and experiment between 20250618 and 20250915.\r\n\r\nData products from this deployment include: birdbath scans (90 degree elevation scans used for calibration) and volume scans (vol).\r\n\r\nFor further details of this deployment and the associated dataset please see the internal file metadata and also the linked scan document.\r\n\r\nThese data conform to the 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": "published",
    "dataPublishedTime": "2026-08-10T13:57:52",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://catalogue.ceda.ac.uk/api/v2/observations/45915/?format=api",
        "dataPath": "/badc/ncas-mobile/data/ncas-radar-x-band-2/20250603_teamx/v1.0.0",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 6585178430446,
        "numberOfFiles": 45741,
        "fileFormat": "Data are netCDF formatted."
    },
    "timePeriod": "https://catalogue.ceda.ac.uk/api/v2/times/13175/?format=api",
    "geographicExtent": "https://catalogue.ceda.ac.uk/api/v2/bboxes/5019/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/10621/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59111/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59112/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59113/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59115/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59127/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59128/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59129/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59130/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59131/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59132/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59133/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59134/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/59135/?format=api",
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    ],
    "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": [],
    "projects": [
        "https://catalogue.ceda.ac.uk/api/v2/projects/44846/?format=api"
    ],
    "observationcollection_set": [
        "https://catalogue.ceda.ac.uk/api/v2/observationcollections/45397/?format=api"
    ],
    "responsiblepartyinfo_set": [
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        "https://catalogue.ceda.ac.uk/api/v2/rpis/219446/?format=api",
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        "https://catalogue.ceda.ac.uk/api/v2/rpis/219452/?format=api"
    ],
    "procedureAcquisition": "https://catalogue.ceda.ac.uk/api/v2/acquisitions/45916/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://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, attribution required"
        }
    ],
    "discoveryKeywords": []
}