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/31791/?format=api

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

{
    "ob_id": 31791,
    "uuid": "2e656d34d016414c8d6bced18634772c",
    "title": "ESA Aerosol Climate Change Initiative (Aerosol_cci): Level 3 aerosol products  from the Multi-Sensor UV Absorbing Aerosol Index (MS UVAI) algorithm, Version 1.7",
    "abstract": "The ESA Climate Change Initiative Aerosol project has produced a number of global aerosol Essential Climate Variable (ECV) products from a set of European satellite instruments with different characteristics.   This dataset comprises Level 3 Absorbing Aerosol Index (AAI) products, using the Multi-Sensor UVAI algorithm, Version 1.7.  L3 products are provided as daily and monthly gridded products as well as a monthly climatology. \r\n\r\nFor further details about these data products please see the linked documentation.",
    "keywords": "ESA, CCI",
    "publicationState": "published",
    "dataPublishedTime": "2020-08-27T16:02:30",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/31792/?format=api",
        "dataPath": "/neodc/esacci/aerosol/data/MS_UVAI/L3/v1.7/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 8738316730,
        "numberOfFiles": 13079,
        "fileFormat": "Data are in NetCDF format"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/8691/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/529/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/12056/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/12057/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/12058/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/20627/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/20628/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/30165/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/30166/?format=api"
    ],
    "dataLineage": "Data were processed by the ESA CCI Aerosol project team and supplied to CEDA in the context of the ESA CCI Open Data Portal Project.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/13341/?format=api"
    ],
    "observationcollection_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140263/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140264/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140265/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140266/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140259/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140260/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140261/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140262/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140267/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/140268/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2555/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_aerosol_terms_and_conditions.pdf",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        },
        {
            "ob_id": 1140,
            "name": "ESACCI"
        }
    ]
}