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/27605/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 27605,
    "uuid": "b963913b22fe47caaa39e27dcbf0021e",
    "title": "FIDUCEO:  MVIRI Albedo and Uncertainties, Climate Data Record, 1991 - 2007, V0.1.1",
    "abstract": "The MVIRI  Albedo and Uncertainties demonstration dataset contains the broadband surface albedo  as retrieved from the visible channel of the Meteosat Visible and Infrared Imager (MVIRI) operated on board Meteosat First Generation (MFG) spacecrafts. The channel is centered around 0.7 µm but the spectral coverage of this channel is very broad. The dataset is produced for 2 of the 7 Meteosat satellites, Meteosat -5 and Meteosat-7, that were operated during the period between 1991 and 2007. While Meteosat-7 was, during the considered period, positioned above 0° longitude, Meteosat-5 was moved from 0° to 63° longitude in support of the INDOEX Experiment in 1998, with continued service in the course of the Indian Ocean Data Coverage (IODC) mission.\r\n\r\nThe albedo data was retrieved from the MVIRI fundamental climate data record; both were produced as part of the FIDUCEO (Fidelity and uncertainty in climate data records from Earth Observations) EU Horizon 2020 project.",
    "keywords": "Uncertainty, Albedo, MVIRI, Meteosat, Climate Data Record, FIDUCEO",
    "publicationState": "published",
    "dataPublishedTime": "2019-11-08T17:49:12",
    "doiPublishedTime": null,
    "updateFrequency": "",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/27760/?format=api",
        "dataPath": "/neodc/fiduceo/data/cdr/albedo/v0.1.1/mviri/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 80987231399,
        "numberOfFiles": 5777,
        "fileFormat": "netDF 4.0 file format for fulll detail see FIDUCEO file format specification in the documentation"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/7434/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/2442/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/25544/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/25546/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/25547/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68476/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68477/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/70613/?format=api"
    ],
    "dataLineage": "Supplied to CEDA for archival by Frank Ruethrich of EUMETSAT  on behalf of the H2020 FIDUCEO project. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 638822.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/27632/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/27633/?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/116006/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116004/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116011/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116008/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116005/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116003/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116007/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116009/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116001/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116094/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/115414/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116010/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116000/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/115999/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/116002/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": "https://api.catalogue.ceda.ac.uk/api/v2/composites/27759/?format=api",
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2528/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "http://creativecommons.org/licenses/by/4.0/",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}