Observation Instance – Django REST framework

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/6169/?format=api

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 6169,
    "uuid": "62b7c0a31297c5a0fe115083eb8036c6",
    "title": "NERC Mesosphere-Stratosphere-Troposphere (MST) Radar Facility: Surface precipitation data from the Vaisala WXT510 instrument, Capel Dewi site, Wales (2007-2015)",
    "abstract": "Surface precipitation measurements from the precipitation sensor on the Vaisala WXT510 instrument deployed at the Natural Environment Research Council's (NERC) Mesosphere-Stratosphere-Troposphere (MST) Radar Facility, Capel Dewi, near Aberystwyth in West Wales. \r\n\r\nThese data are available to any registered CEDA user under the UK Open Government Licence.\r\n\r\nSurface pressure, temperature and humidity data (PTU) from this instrument are also available as a separate dataset within the MST Radar Facility dataset collection.\r\n\r\nThe WXT-510 instrument at the site began operational recording in December 2007 and ceased in January 2015, subsequently being replaced by a Vaisala WXT-520 instrument. The WXT520 data are also available from CEDA as part of the MST Radar Facility's dataset collection.\r\n\r\nIndependent surface meteorological data are also collected from a suite of instruments by a Campbell Scientific CR10 Climate Data Logger. These data are available as a separate dataset within the MST Radar Facility dataset collection.",
    "keywords": "MST, precipitation, surface meteorology",
    "publicationState": "citable",
    "dataPublishedTime": "2012-09-28T14:25:41",
    "doiPublishedTime": "2017-08-25T11:05:37",
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://catalogue.ceda.ac.uk/api/v2/observations/6170/?format=api",
        "dataPath": "/badc/mst/data/met-sensors-wxt510-precip",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 56281433,
        "numberOfFiles": 2496,
        "fileFormat": "Data are in Climate and Forecast conventions (CF) compliant netCDF files."
    },
    "timePeriod": "https://catalogue.ceda.ac.uk/api/v2/times/1815/?format=api",
    "geographicExtent": "https://catalogue.ceda.ac.uk/api/v2/bboxes/515/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://catalogue.ceda.ac.uk/api/v2/phenomona/21941/?format=api",
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    ],
    "dataLineage": "Data were acquired by the MST radar facility and sent to the British Atmospheric Data Centre (BADC) within an hour of acquisition. Data were then immediately ingested into the BADC archives.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
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        "https://catalogue.ceda.ac.uk/api/v2/identifiers/3997/?format=api"
    ],
    "projects": [
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    ],
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