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/20969/?format=api

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

{
    "ob_id": 20969,
    "uuid": "274c3919a53e4972b67e0129a6898304",
    "title": "WCRP CMIP5: The CNRM-CERFACS team CNRM-CM5 model output for the historical experiment",
    "abstract": "WCRP CMIP5: The CNRM-CERFACS team CNRM-CM5 model output for the historical experiment. These data cover the following realms: atmos, land, landIce, ocean, ocnBgchem and seaIce; at the following frequencies: 3hr, 6hr, day, fx, mon and yr. The runs included the ensemble members: r0i0p0, r10i1p1, r1i1p1, r2i1p1, r3i1p1, r4i1p1, r5i1p1, r6i1p1, r7i1p1, r8i1p1 and r9i1p1.\n\nThe WCRP Coupled Model Intercomparison Project, Phase 5 (CMIP5), was a global climate model intercomparison project, coordinated by PCMDI (Program For Climate Model Diagnosis and Intercomparison) on behalf of the World Climate Research Program (WCRP) and provided input for the Intergovernmental Panel on Climate Change (IPCC) 5th Assessment Report (AR5).\n\nThe CNRM-CERFACS team consisted of the following agencies: Centre National de Recherches Meteorologiques (CNRM) and Centre Europeen de Recherche et Formation Avancees en Calcul Scientifique (CERFACS).",
    "keywords": "CMIP5, CMIP, WCRP, climate change, CNRM-CERFACS, CNRM-CM5, historical, atmos, land, landIce, ocean, ocnBgchem, seaIce, 3hr, 6hr, day, fx, mon, yr",
    "publicationState": "published",
    "dataPublishedTime": "2017-03-17T14:20:02.942449",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/20968/?format=api",
        "dataPath": "/badc/cmip5/data/cmip5/output1/CNRM-CERFACS/CNRM-CM5/historical/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 12161001181811,
        "numberOfFiles": 33709,
        "fileFormat": "Data are netCDF formatted."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/5553/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/529/?format=api",
    "nonGeographicFlag": false,
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    "dataLineage": "Data were produced and verified by The CNRM-CERFACS team scientists before publication via the Earth Systems Grid Federation (ESGF) and a copy obtained by the Centre for Environmental Data Analysis (CEDA).",
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    "removedDataReason": "",
    "language": "English",
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    "procedureAcquisition": null,
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