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/41480/?format=api

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

{
    "ob_id": 41480,
    "uuid": "9458b2aea1cf4dd48a7ff810a4197304",
    "title": "Chamber reaction products identified from toluene/m-xylene oxidation using GCxGC TOFMS at the University of Birmingham",
    "abstract": "A list of reaction products from the  photo-oxidation of m-xylene and toluene in chamber experiments for the  Quantitative Attribution of Secondary Organic Aerosol in Beijing to its Precursors project which was  part of the Air Pollution and Human Health in Developing Megacities programme.\r\n\r\nA potential aerosol mass (PAM) chamber was used to investigate the oxidised products from the photo-oxidation of m-xylene and toluene. The chamber experiments were carried out with hydroxyl (OH) radical as oxidant in both high- and low-NOx conditions and the resultant aerosol samples were collected using quartz filters and analysed by the two dimensional Gas Chromatography Time-Of-Flight Mass Spectrometry (GC×GC-TOFMS) at the University of Birmingham.",
    "keywords": "APHH, aerosol",
    "publicationState": "published",
    "dataPublishedTime": "2024-02-15T14:26:01",
    "doiPublishedTime": null,
    "updateFrequency": "",
    "status": "ongoing",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/41477/?format=api",
        "dataPath": "/badc/aphh/data/beijing/bham-gc-pam/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 10072,
        "numberOfFiles": 3,
        "fileFormat": "BADC-CSV"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/11561/?format=api",
    "geographicExtent": null,
    "nonGeographicFlag": true,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/79912/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/79913/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/79914/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/79915/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/79916/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/79917/?format=api"
    ],
    "dataLineage": "Data were produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/24808/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/41476/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/24817/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/202161/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/202154/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/202155/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/202156/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/202157/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/202158/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/202159/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/202153/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/202160/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/41479/?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": []
}