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/32973/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 32973,
    "uuid": "d399794d81fa41779a925b6d4758a5cd",
    "title": "MIDAS Open: UK daily weather observation data, v202107",
    "abstract": "The UK daily weather observation data contain meteorological values measured on a 24 hour time scale. The measurements of sunshine duration, concrete state, snow depth, fresh snow depth, and days of snow, hail, thunder and gail were attained by observation stations operated by the Met Office across the UK operated and transmitted within DLY3208, NCM, AWSDLY and SYNOP messages. The data span from 1887 to 2020. For details of observations see the relevant sections of the MIDAS User Guide linked from this record for the various message types.\r\n\r\nThis version supersedes the previous version of this dataset and a change log is available in the archive, and in the linked documentation for this record, detailing the differences between this version and the previous version. The change logs detail new, replaced and removed data. Of particular note, however, is that as well as including data for 2020, historical data recovery has added further data for Eastbourne (1887-1910).\r\n\r\nThis dataset is part of the Midas-open dataset collection made available by the Met Office under the UK Open Government Licence, containing only UK mainland land surface observations owned or operated by the Met Office. It is a subset of the fuller, restricted Met Office Integrated Data Archive System (MIDAS) Land and Marine Surface Stations dataset, also available through the Centre for Environmental Data Analysis - see the related dataset section on this record. Currently this represents approximately 95% of available daily weather observations within the full MIDAS collection.",
    "keywords": "Met Office, MIDAS, UK, meteorology, daily, diurnal, monthly",
    "publicationState": "citable",
    "dataPublishedTime": "2021-08-26T10:03:59",
    "doiPublishedTime": "2021-09-08T10:28:40",
    "updateFrequency": "notPlanned",
    "status": "superseded",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/32977/?format=api",
        "dataPath": "/badc/ukmo-midas-open/data/uk-daily-weather-obs/dataset-version-202107/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 3006018865,
        "numberOfFiles": 46758,
        "fileFormat": "Data are BADC-CSV formatted."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/9049/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/18/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68435/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68437/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68439/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68443/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68454/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68455/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68457/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68458/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68459/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68460/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68810/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68820/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/86989/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/87012/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89205/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89206/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89207/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89208/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89209/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89210/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89211/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89212/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89213/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89214/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89215/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89216/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89217/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89218/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89219/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89220/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89221/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89222/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89223/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89224/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89225/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89226/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89227/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/89228/?format=api"
    ],
    "dataLineage": "Data collated by the Met Office and archived in the Met Office's MIDAS database. Data are extracted from a sub-set of available tables and delivered to Centre for Environmental Data Analysis (CEDA) approximately on a yearly basis.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/10928/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/1186/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/26184/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/147215/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/147220/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/147219/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/147214/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/147221/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/147218/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/147217/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/147216/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/147222/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/1246/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "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"
        }
    ]
}