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/31905/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 31905,
    "uuid": "725e1339c06344cc813e4cb123c12f81",
    "title": "HadUK-Grid Gridded Climate Observations on a 25km grid over the UK, v1.0.2.1 (1862-2019)",
    "abstract": "HadUK-Grid is a collection of gridded climate variables derived from the network of UK land surface observations. The data have been interpolated from meteorological station data onto a uniform grid to provide complete and consistent coverage across the UK. The dataset at 25 km resolution is derived from the associated 1 km x 1 km resolution to allow for comparison to data from UKCP18 climate projections. The dataset spans the period from 1862 to 2019, but the start time is dependent on climate variable and temporal resolution.\r\n\r\nThe gridded data are produced for daily, monthly, seasonal and annual timescales, as well as long term averages for a set of climatological reference periods. Variables include air temperature (maximum, minimum and mean), precipitation, sunshine, mean sea level pressure, wind speed, relative humidity, vapour pressure, days of snow lying, and days of ground frost.\r\n\r\nThis data set supersedes the previous versions of this dataset which also superseded UKCP09 gridded observations. Subsequent versions may be released in due course and will follow the version numbering as outlined by Hollis et al. (2018, see linked documentation).\r\n\r\nFor this version of note is that historical data recovery has improved monthly rainfall 1862-1910, daily rainfall 1883-1910, monthly temperature 1900-1909, and additional sunshine grids for 1919-1928 have been added.\r\n\r\nThe primary purpose of these data are to facilitate monitoring of UK climate and research into climate change, impacts and adaptation. The datasets have been created by the Met Office with financial support from the Department for Business, Energy and Industrial Strategy (BEIS) and Department for Environment, Food and Rural Affairs (DEFRA) in order to support the Public Weather Service Customer Group (PWSCG), the Hadley Centre Climate Programme, and the UK Climate Projections (UKCP18) project. The data recovery activity to supplement 19th and early 20th Century data availability has also been funded by the Natural Environment Research Council (NERC grant ref: NE/L01016X/1) project \"Analysis of historic drought and water scarcity in the UK\". The dataset is provided under Open Government Licence.",
    "keywords": "Met Office, UKCP18, BEIS, Defra, land surface, climate observations, hadobs",
    "publicationState": "citable",
    "dataPublishedTime": "2020-10-19T11:50:43",
    "doiPublishedTime": "2020-10-21T10:31:27",
    "updateFrequency": "notPlanned",
    "status": "superseded",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/31935/?format=api",
        "dataPath": "/badc/ukmo-hadobs/data/insitu/MOHC/HadOBS/HadUK-Grid/v1.0.2.1/25km",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 2118008841,
        "numberOfFiles": 6094,
        "fileFormat": "Data are NetCDF formatted."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/8763/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/2305/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/1633/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/6023/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/7026/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/7028/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11482/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11483/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11484/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11485/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11486/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11520/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11521/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/11522/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21577/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21581/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21634/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21635/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21637/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21638/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21642/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21663/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21664/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21665/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21666/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21667/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21669/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/21671/?format=api"
    ],
    "dataLineage": "Data provided by the UK Met Office for archiving in the Centre for Environmental Data Analysis (CEDA) archives.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/10783/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/13164/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/26862/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140896/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140891/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140895/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140892/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140889/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140893/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140890/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140894/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140898/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140897/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140899/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140900/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140901/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140902/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140903/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/26870/?format=api",
    "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"
        }
    ]
}