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/3500/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 3500,
    "uuid": "5c81db56554e894173ccb95e1ac91887",
    "title": "Chilbolton Facility for Atmospheric and Radio Research (CFARR) Microwave Radiometer Data",
    "abstract": "Data were collected by the Chilbolton Facility for Atmospheric and Radio Research (CFARR) Visible Radiometer from 10th of May 2001 to the present at Chilbolton, Hampshire. The dataset contains measurements of Calibrated brightness temperature measured at 21 frequencies (selectable) between 22.0 and 30.0 GHz, water vapour profile, and integrated water vapour (IWV). Data are produced once every approximately 2 minutes.",
    "keywords": "CFARR, Chilbolton, radiometer, microwave",
    "publicationState": "published",
    "dataPublishedTime": "2003-09-20T14:32:45",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://catalogue.ceda.ac.uk/api/v2/observations/3501/?format=api",
        "dataPath": "/badc/chilbolton/data/radiometers-microwave",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 217389807,
        "numberOfFiles": 1713,
        "fileFormat": "Data are netCDF formatted"
    },
    "timePeriod": "https://catalogue.ceda.ac.uk/api/v2/times/977/?format=api",
    "geographicExtent": "https://catalogue.ceda.ac.uk/api/v2/bboxes/59/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/22455/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/50512/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/54762/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/54763/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/54764/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/57469/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/57470/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/57471/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/57472/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/57473/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/57474/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/57475/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/88006/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/88147/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/88163/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/89849/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/89936/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/89972/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/90005/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/90115/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/90139/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/90151/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/90303/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/90854/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/91043/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/91078/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/91621/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/91633/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/91665/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/91692/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/96410/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/96439/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/96441/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/96571/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/96610/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/96648/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/96702/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/97916/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/97919/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/97932/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/97992/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98036/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98042/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98770/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98771/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98772/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98773/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98774/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98775/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98776/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98777/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98778/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98779/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98780/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98781/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98782/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98783/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98784/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98785/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98786/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98787/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98788/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98789/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98790/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98791/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98792/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98793/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98794/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98795/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98796/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98797/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98798/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98799/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98800/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98801/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98802/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98803/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98804/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98805/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98806/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98807/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98808/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98809/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98810/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98811/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98812/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98813/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98814/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98815/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98816/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98817/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98818/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98819/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98820/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98821/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98822/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98823/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98824/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98825/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98826/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98827/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98828/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98829/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98830/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98831/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98832/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98833/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98834/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98835/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/98836/?format=api"
    ],
    "dataLineage": "Data are collected by 4 radar systems, of which the largest is the 3 GHz Doppler radar (CAMRa), and 4 lidar systems, at Chilbolton Observatory, Hampshire.\r\nData are prepared by Chilbolton Facility for Atmospheric and Radio Research (CFARR) staff prior to submission to BADC for archiving.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://catalogue.ceda.ac.uk/api/v2/identifiers/2366/?format=api"
    ],
    "projects": [
        "https://catalogue.ceda.ac.uk/api/v2/projects/3464/?format=api"
    ],
    "observationcollection_set": [
        "https://catalogue.ceda.ac.uk/api/v2/observationcollections/3461/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/observationcollections/7378/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/observationcollections/32603/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://catalogue.ceda.ac.uk/api/v2/rpis/14904/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/14905/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/14906/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/14907/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/14909/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/42297/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/42301/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/14903/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/42298/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/42299/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/42300/?format=api"
    ],
    "procedureAcquisition": "https://catalogue.ceda.ac.uk/api/v2/acquisitions/3503/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://catalogue.ceda.ac.uk/api/v2/observations/2522/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "registered",
            "accessRoles": null,
            "label": "registered: None group",
            "licenceURL": "http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
            "licenceClassifications": "any, attribution required"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}