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/25897/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 25897,
    "uuid": "3d23afc9bb024c558058749faae4cf2d",
    "title": "The impact of stratospheric ozone feedbacks on climate sensitivity estimates",
    "abstract": "Data for each figure presented in the paper 'The impact of stratospheric ozone feedbacks on climate sensitivity estimates', as appeared in Journal of Geophysical Research: Atmospheres in the year 2018.\r\n- The temporal resolution ('temporalResolution'): depends on the variable: annual means or multi-annual-means.\r\n- 'timeslice' climate model simulations using the HadGEM3-AO model from the UK Met Office, coupled to the interactive atmospheric chemistry scheme UKCA. References to model descriptions can be found in the publication. The simulations consist of a pre-industrial control run (A) and several abrupt4xCO2 simulations carried out with different treatments of atmospheric chemistry (B, D1, D2).\r\n- 'umid' is the ID of the simulation, to be read from the stitching table.\r\n- 'variable' names: 'temp': temperature, 'olr': Outgoing longwave radiation at the top of the atmosphere (TOA), 'csolr': same as olr but under clear sky conditions, 'field207': upward clear sky shortwave flux at the TOA, 'field201': Outgoing SW Flux at the TOA, 'tracer1': ozone mass mixing ratios, 'field1426': frozen cloud fraction in each grid cell, 'q': specific humidity, 'u': zonal wind component, 'ht': tropopause height in km following the WMO lapse rate definition.\r\n",
    "keywords": "",
    "publicationState": "published",
    "dataPublishedTime": "2018-05-23T15:35:43",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/25896/?format=api",
        "dataPath": "/badc/deposited2018/acci_JGR_2018/data",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 310100,
        "numberOfFiles": 25,
        "fileFormat": "NetCDF"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/6992/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/2188/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/1322/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/4385/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11306/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11307/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/24329/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50559/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/51582/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/51584/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/53860/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/53876/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/55476/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/55676/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56946/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56948/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56955/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56972/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58564/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61257/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61258/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61259/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61260/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61261/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61262/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61263/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61264/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61265/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/61266/?format=api"
    ],
    "dataLineage": "Model simulations with the HadGEM3-AO global climate model on the MonSooN supercomputer (both UK Met Office). The data was temporarily stored on the MASS data archive and then transferred directly",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/25898/?format=api"
    ],
    "observationcollection_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108290/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108285/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108286/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108287/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108288/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108289/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108291/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108284/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108292/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108293/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/108294/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/25899/?format=api",
    "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"
        }
    ]
}