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/25345/?format=api

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

{
    "ob_id": 25345,
    "uuid": "322d59be9b544a1d8f4beddc1acf244c",
    "title": "BT Tower: O3 and NOx measurements",
    "abstract": "This dataset contains O3 and NOx measurements made at the BT tower, London (T35 level), sampled from a height of approx 180 metres above the ground. The measurements were made using a TEI 49i analyser and TEI 42CTL analyser.  This dataset is part of longterm measurements at the BT tower for the National Centre for Atmospheric Science (NCAS)",
    "keywords": "NCAS, AMF, AMOF, O3, NOX, BT tower",
    "publicationState": "published",
    "dataPublishedTime": "2021-10-27T09:51:18",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "ongoing",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/25343/?format=api",
        "dataPath": "/badc/ncas/bt-tower_archive/york-o3-nox",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 36266540,
        "numberOfFiles": 11,
        "fileFormat": "Data are NASA Ames formatted"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/6856/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/913/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/22590/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/25394/?format=api"
    ],
    "dataLineage": "Data were produced by the NCAS AMF team and sent to the Centre for Environmental Data Analysis (CEDA) for archiving.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/876/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/11686/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/25347/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/11685/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/25346/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/103922/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/103923/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/103924/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/103925/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/103926/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/103928/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/103929/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/103930/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/103927/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/25344/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "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": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}