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/2976/?format=api

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

{
    "ob_id": 2976,
    "uuid": "50f64ba99a0131554d47bc02ea2183c2",
    "title": "ADRIEX: ECMWF boundary layer model output",
    "abstract": "The Aerosol Direct Radiative Impact Experiment (ADRIEX) was a joint UK Met Office/Natural Environment Research Council (NERC)/UK Royal Society/University of Oslo project aiming at improving our understanding of the radiative effects of anthropogenic aerosol and gases (ozone and methane) in the troposphere.\r\n\r\nThis dataset contains ECMWF Boundary layer model data from a ECMWF Computer.",
    "keywords": "ADRIEX, ECMWF",
    "publicationState": "published",
    "dataPublishedTime": "2016-04-13T14:57:04",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2977/?format=api",
        "dataPath": "/badc/adriex/data/forecasts/ecmwf-blz",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 13813904,
        "numberOfFiles": 665,
        "fileFormat": "Images are PNG fomatted."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/796/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/51/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [],
    "dataLineage": "Trajectories and other forecast products calculated by John Methven (University of Reading), based on European Centre for Medium-Range Weather Forecasts (ECMWF) forecast wind fields, to support Aerosol Direct Radiative Impact Experiment (ADRIEX) flight planning.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/2056/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/2968/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/2965/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13423/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13421/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13424/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/51188/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13422/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13425/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13426/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13432/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13428/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13429/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13430/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13431/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/3829/?format=api",
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2578/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "restricted",
            "accessRoles": "ecmwftrj",
            "label": "restricted: ecmwftrj group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/specific_licences/ukmo_agreement.pdf",
            "licenceClassifications": "academic"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}