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/10941/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 10941,
    "uuid": "54988e5b7aff4e929ac02e73f3c777ca",
    "title": "Geomagnetic Daily Indices Reports",
    "abstract": "This dataset consists of daily paper reports of various geomagnetic indices, global and local, from a range of observatories. Date ranges vary and are no longer updated as paper records, but are generally available online from the UKSSDC or other sources.\r\n\r\nThe reports include:\r\n\r\nAmerican Association of Variable Star Observers (AAVSO) Sunspot Numbers\r\nGeomagnetic Auroral Electrojet (AE) indices\r\nBartels Music Diagrams\r\nCircular of Basic Indices for Ionospheric Propagation, CNET Lannion\r\nDisturbance Storm Time (DST)\r\nInternational Association of Geomagnetism and Aeronomy (IAGA) Bulletins\r\nIF2 indices\r\nIG indices\r\nIndia Solar and Geophysical Data\r\nIonospheric Prediction Service (IPS) Predictions\r\nInternational Service for Geomagnetic Indices (ISGI) Reports\r\nMagnetic Indices\r\nSolar-Geophysical Data, Prompt and Comprehensive Reports, National Oceanic and Atmospheric Administration (NOAA), 1968 - 2001\r\nSolar Radio Noise",
    "keywords": "Geomagnetic Indices Reports",
    "publicationState": "working",
    "dataPublishedTime": null,
    "doiPublishedTime": null,
    "updateFrequency": "",
    "status": "planned",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/19783/?format=api",
        "dataPath": "http://www.ukssdc.ac.uk/wdcc1/daily_reports.html",
        "oldDataPath": [],
        "storageLocation": "external",
        "storageStatus": "offline",
        "volume": 0,
        "numberOfFiles": 0,
        "fileFormat": "ASCII"
    },
    "timePeriod": null,
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/1/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [],
    "dataLineage": "neeeded",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/19805/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/10940/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/39342/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/39341/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/39343/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/39346/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/39347/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/39348/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/39345/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/39344/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "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": []
}