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/11697/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 11697,
    "uuid": "e0659b01259145c8bfb0de6eb12c2690",
    "title": "ESA Sea Surface Temperature Climate Change Initiative (ESA SST CCI): GHRSST Multi-Product ensemble (GMPE)",
    "abstract": "The ESA Sea Surface Temperature Climate Change Initiative (ESA SST CCI) dataset accurately maps the surface temperature of the global oceans over the period 1991 to 2010 using observations from many satellites. The data provides an independently quantified SST to a quality suitable for climate research. \r\n\r\nThe GHRSST Multi-Product Ensemble (GMPE) dataset is an ensemble median of the ESA SST CCI spatially complete analysis with other level 4 SST analysis products.   Anomalies of the analyses relative to the  median, and the ensemble standard deviation are also provided.\r\n\r\nAll the data in the GMPE files are regridded onto a common 0.25 degree regular latitude longitude grid and there are\r\nSST fields for each day. The GMPE for the ESA SST CCI long term product covers the period September 1991 to December\r\n2010. GMPE files are also available for ESA SST CCI demonstration product 1 (which covers June to August 2007).",
    "keywords": "ESA, SST CCI",
    "publicationState": "citable",
    "dataPublishedTime": "2014-12-03T12:00:00",
    "doiPublishedTime": "2015-02-24T00:00:00",
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/30265/?format=api",
        "dataPath": "/neodc/esacci/sst/data/gmpe/CDR_V1/",
        "oldDataPath": [
            "https://api.catalogue.ceda.ac.uk/api/v2/results/11696/?format=api"
        ],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 32065793472,
        "numberOfFiles": 7186,
        "fileFormat": "The GMPE is formed of daily NetCDF files containing various fields including the median of the ensemble, the anomaly of each ensemble member from that median and the SST gradients from each product. Where we do not have permission to redistribute data, the anomaly and gradient fields are filled with the missing data indicator (which is found in the _FillValue attribute to the variables and is set to -32768). The median_type variable, which reveals which analysis supplied the median at each location, has also been filled with the missing data value.\r\n\r\nFile names for the GMPE files are in the form 20101231120000-UKMO-L4_GHRSST-SST-GMPEREAN-GLOB-v02.0-fv02.0.nc.The first eight digits give the year (first four digits) followed by the month and the day (two digits each). For the period  June to August 2007 there are GMPE files that contain the ESA SST CCI demonstration product 1 in addition to the analyses compared over the full period of the long term product. These have GLOB_DM in their file names in place of GLOB."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/3266/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/1/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/3301/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/3302/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/9594/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10294/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10295/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10296/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10297/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10298/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10299/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10300/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10301/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10302/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/10303/?format=api"
    ],
    "dataLineage": "Data were processed and supplied to the NEODC by the ESA CCI SST project team.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/8340/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/11008/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/11005/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/30128/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/45328/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/45370/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/45368/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/45369/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/75983/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/143570/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/45374/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/45378/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/45371/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/45380/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2556/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_sst_terms_and_conditions.pdf",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}