GET

Observation Instance

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/45669/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 45669,
    "uuid": "5c4840f2437648bbb9e898587f67617c",
    "title": "EXPECT: Data assimilation of satellite ESA CCI soil moisture into JULES",
    "abstract": "This dataset contains the output of gridded JULES (Joint UK Land Environment Simulator) runs from 1980-2019 over Europe before and after the 4DEnVar data assimilation of satellite ESA CCI (Climate Change Initiative) soil moisture, This output is from work-package WP1.2 of the HORIZON Europe EXPECT project: “Towards an Integrated Capability to Explain and Predict Regional Climate Changes”. \r\n\r\nForcing data from the Watch Forcing Data ERA5 data set was used. The ESA CCI soil moisture data was assimilated using the 4DEnVar technique of Pinnington et al. (2021), which assumes the 15 parameters of the Tóth pedotransfer function (PTF) are constant over the entire region of Europe. The JULES suite u-dx313 was used to determine the posterior PTF parameters for the time period 2014-2018,  followed by full JULES runs with suite u-du244 for both the prior and the posterior PTF parameters from 1980-2019.",
    "keywords": "JULES,4DEnVar data assimilation,ESA CCI soil moisture,WFDE5 driving data",
    "publicationState": "citable",
    "dataPublishedTime": "2026-06-10T09:24:00",
    "doiPublishedTime": "2026-07-23T09:50:45",
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://catalogue.ceda.ac.uk/api/v2/observations/46044/?format=api",
        "dataPath": "/badc/deposited2026/EXPECT_WP1p2_project_output",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 287813083494,
        "numberOfFiles": 175,
        "fileFormat": "NetCDF"
    },
    "timePeriod": "https://catalogue.ceda.ac.uk/api/v2/times/13060/?format=api",
    "geographicExtent": "https://catalogue.ceda.ac.uk/api/v2/bboxes/5108/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/6023/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/7565/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/8142/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/16668/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/84125/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/84126/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93738/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93739/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93740/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93741/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93742/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93743/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93744/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93745/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93746/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93747/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93748/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93749/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93750/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93751/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93752/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93753/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93754/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93755/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93756/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93757/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93758/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93759/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93760/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93761/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93762/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93763/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93764/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93765/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93766/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93767/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93768/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93769/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93770/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93771/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93772/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93773/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93774/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93775/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93776/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93777/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93778/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93779/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93780/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93781/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93782/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93783/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93784/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/93785/?format=api"
    ],
    "dataLineage": "Data were produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://catalogue.ceda.ac.uk/api/v2/identifiers/13936/?format=api"
    ],
    "projects": [
        "https://catalogue.ceda.ac.uk/api/v2/projects/46046/?format=api"
    ],
    "observationcollection_set": [],
    "responsiblepartyinfo_set": [
        "https://catalogue.ceda.ac.uk/api/v2/rpis/220092/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/218253/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/218254/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/218255/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/218256/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/218257/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/218258/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/218252/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/218259/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/218260/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://catalogue.ceda.ac.uk/api/v2/computations/46045/?format=api",
    "permissions": [
        {
            "ob_id": "https://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, attribution required"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}