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/13839/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 13839,
    "uuid": "442ca7e6428543ad88d5721f98edc746",
    "title": "Data from the 17km70lev configuration of the Met Office Global NWP model - Release 03/2015",
    "abstract": "Data from the operational NWP (Numerical Weather Prediction) output from the global atmospheric part of the Met Office Unified Model. Analyses and first forecast steps are stored to give an hourly time resolution for 6 hours following each analysis time-step. This archive currently holds data from January 2012 onwards but data will be back populated for earlier years.",
    "keywords": "NWP, Met Office, UM, unified model, Global atmospheric model",
    "publicationState": "published",
    "dataPublishedTime": "2015-12-18T14:23:31",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "ongoing",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/13840/?format=api",
        "dataPath": "/badc/ukmo-nwp/data/global/17km70lev/r2015_03",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 2268066497889,
        "numberOfFiles": 951,
        "fileFormat": "Met Office PP file format."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/3705/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/1/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/2820/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50653/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50654/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50656/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50659/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50663/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50664/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50671/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50672/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50673/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50675/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50678/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50680/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50684/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50685/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50686/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50688/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50689/?format=api",
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        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50711/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50712/?format=api",
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        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50715/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50716/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50719/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50720/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50721/?format=api",
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        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50739/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50742/?format=api",
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        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56814/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56816/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56817/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56818/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56822/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56823/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56824/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56825/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56826/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56827/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56828/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56829/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/56832/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/57450/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/57451/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/60896/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/60897/?format=api",
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        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/82182/?format=api"
    ],
    "dataLineage": "Following data transfer issues between the Met Office and the BADC, the Met Office NWP data updates were suspended on 18th January 2012. A new data transfer route was established and at the same time, CEDA-BADC decided to revamp the entire NWP archive and created a new NWP archive. This new archive is essentially a mirror of a subset of the NWP archive at the Met Office (as extracted from the Met Office Archive Storage System (MASS)).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/8716/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/555/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/3939/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/1042/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/53023/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/53024/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/53025/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/53022/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/53027/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/53028/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/53029/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/53026/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/54837/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/168612/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/1045/?format=api",
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2667/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "registered",
            "accessRoles": null,
            "label": "registered: None group",
            "licenceURL": "https://creativecommons.org/licenses/by-nc-sa/4.0/",
            "licenceClassifications": "personal, academic, policy"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}