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/8322/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 8322,
    "uuid": "b9f371df3a07cbb5944484cdc785a0a5",
    "title": "(A)ATSR Validation Campaign - SISTeR SST Data from MS Color Festival",
    "abstract": "Skin Sea Surface Temperature data from the (A)ATSR Validation Campaign by SISTeR (Scanning Infrared Sea surface Temperature Radiometer). To ensure the accuracy of the (A)ATSR, there have been joint efforts to validate the measurement data. One of these efforts is the (A)ATSR Validation Campaign which involves the deployment of the Scanning Infrared Sea surface Temperature Radiometer (SISTeR). This dataset contains the SST between Oslo, Norway and Frederikshavn, Denmark measured by the SISTeR on-board MS Color Festival during her voyages in 2006.",
    "keywords": "",
    "publicationState": "published",
    "dataPublishedTime": "2007-07-08T14:27:46",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/8323/?format=api",
        "dataPath": "/neodc/sister/data/Festival",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 842249405,
        "numberOfFiles": 234,
        "fileFormat": "&lt;div property=\"cedacat:formats\"&gt;\n&lt;div class=\"formats\"&gt;Data availability and file format&lt;/div&gt;\n&lt;p&gt;\nThe data are stored in .nc format. The voyage paths of the ships are also provided in .kml format.\n&lt;/p&gt;\n&lt;p&gt;\nData Coverage:\n&lt;/p&gt;&lt;ul&gt;\n&lt;li&gt; 2006-05-15 - 2006-05-16 &lt;/li&gt;\n&lt;li&gt; 2006-07-18 - 2006-08-17 &lt;/li&gt;\n&lt;li&gt; 2006-08-23 - 2006-09-17 &lt;/li&gt;\n&lt;/ul&gt;\n&lt;p /&gt;\n&lt;/div&gt;\n\n\n"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/2379/?format=api",
    "geographicExtent": null,
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/6019/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/6020/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9550/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9650/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9651/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9652/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9653/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9654/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9655/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9658/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9660/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9661/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9663/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9665/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9666/?format=api"
    ],
    "dataLineage": "The data were acquired by the SISTeR Project team with shipborne SISTeR, and are now held by the NERC Earth Observation Data Centre (NEODC)",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/5338/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/7790/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/8310/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/30127/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33329/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33331/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33332/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33333/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33335/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/43472/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/43470/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33330/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/8326/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.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"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        },
        {
            "ob_id": 1141,
            "name": "NDGO0001"
        }
    ]
}