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/3066/?format=api

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

{
    "ob_id": 3066,
    "uuid": "c17a20f705aeac64e55e681e01cf9d37",
    "title": "Polluted Troposphere TORCH1: NOx measurements at Writtle College, UK",
    "abstract": "Tropospheric ORganic CHemistry Experiment (TORCH) was a Natural Environment Research Council (NERC) Polluted Troposphere Research Programme project (Round 1 - NER/T/S/2002/00145. Duration 2002 - 2005) led by A. Lewis, University of York. TORCH 1 took place in July and August 2003 at Writtle College, near Chelmsford, Essex.\r\n\r\nThis dataset contains NO and NO2 measurements from a trace level chemiluminsence analyser.",
    "keywords": "Polluted Troposphere, TORCH1, Chemistry",
    "publicationState": "published",
    "dataPublishedTime": "2007-03-15T18:27:35",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/3067/?format=api",
        "dataPath": "/badc/polluted-tropo/data/torch/torch1_2003/definitive-nox/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 1354925,
        "numberOfFiles": 2,
        "fileFormat": "Data are NASA Ames formatted"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/822/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/892/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/2686/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/3964/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/3965/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/4766/?format=api"
    ],
    "dataLineage": "Data were collected at Writtle College, near Chelmsford, Essex between 27th July - 30th August 2003. Data files supplied as is to the BADC by the campaign participants.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/2107/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/14344/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/3058/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13760/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13758/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13764/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13761/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13762/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13763/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13765/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/13759/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/55552/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/55553/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/3069/?format=api",
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2543/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "registered",
            "accessRoles": null,
            "label": "registered: None group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/missing_licence.pdf",
            "licenceClassifications": "unstated"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}