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/8311/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 8311,
    "uuid": "2468111923fd4ebc5da07e727e6c88e8",
    "title": "(A)ATSR Validation Campaign - SISTeR SST Data from RMS Queen Mary 2",
    "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 data of the Atlantic Ocean, Indian Ocean, and the Western Pacific measured by the SISTeR on-board RMS Queen Mary 2 (QM2) during her voyages since 2010. The data collection continues despite the end of AATSR mission for continuation of SST measurement before the deployment of SLSTR on Sentinel-3.",
    "keywords": "AATSR, Validation, RMS Queen Mary 2, SST",
    "publicationState": "published",
    "dataPublishedTime": "2014-07-08T14:58:22",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/8312/?format=api",
        "dataPath": "/neodc/sister/data/QM2",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 9625989046,
        "numberOfFiles": 2397,
        "fileFormat": "The data are stored in .nc format. The voyage paths of the ships are also provided in .kml format.\r\n\r\nData Coverage:\r\n\r\n2010-10-02 - 2010-10-08\r\n2010-10-10 - 2010-11-09\r\n2010-11-17 - 2011-04-19\r\n2011-05-17 - 2011-05-17\r\n2011-05-24 - 2011-06-04\r\n2011-06-06 - 2011-07-04\r\n2011-07-13 - 2011-09-20\r\n2011-09-22 - 2011-12-11\r\n2012-01-11 - 2012-03-12\r\n2012-03-14 - 2012-03-22\r\n2012-03-26 - 2012-04-30\r\n2012-05-02 - 2012-05-05\r\n2012-05-11 - 2012-05-24\r\n2012-05-27 - 2012-06-12\r\n2012-06-14 - 2012-06-23\r\n2012-12-04 - 2013-04-24\r\n2013-11-12 - 2013-12-04\r\n2014-01-10 - 2014-02-24"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/2377/?format=api",
    "geographicExtent": null,
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50559/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50561/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52652/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52653/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52654/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52655/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52656/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52657/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52658/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52659/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52660/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52661/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52662/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52663/?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/5331/?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/33307/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33309/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33310/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33311/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/41555/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/41557/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33313/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/33308/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/8316/?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"
        }
    ]
}