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/23420/?format=api

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

{
    "ob_id": 23420,
    "uuid": "2006f0d4bcd14ed09f27557c9a2796a9",
    "title": "WCRP CMIP5: College of Global Change and Earth System Science (GCESS) BNU-ESM model output for the rcp45 experiment",
    "abstract": "WCRP CMIP5: College of Global Change and Earth System Science (GCESS) BNU-ESM model output for the RCP4.5 (rcp45) experiment. These data cover the following realms: aerosol, atmos, land, landIce, ocean, ocnBgchem and seaIce; at the following frequencies: 3hr, 6hr, day, mon and yr. The runs included the ensemble member: r1i1p1.\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).",
    "keywords": "CMIP5, CMIP, WCRP, climate change, BNU, BNU-ESM, rcp45, aerosol, atmos, land, landIce, ocean, ocnBgchem, seaIce, 3hr, 6hr, day, mon, yr",
    "publicationState": "published",
    "dataPublishedTime": "2017-03-17T13:58:11.311084",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/23419/?format=api",
        "dataPath": "/badc/cmip5/data/cmip5/output1/BNU/BNU-ESM/rcp45/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 905455158997,
        "numberOfFiles": 254,
        "fileFormat": "Data are netCDF formatted."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/6353/?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 College of Global Change and Earth System Science (GCESS) scientists before publication via the Earth Systems Grid Federation (ESGF) and a copy obtained by the Centre for Environmental Data Analysis (CEDA).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
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