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/25821/?format=api

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

{
    "ob_id": 25821,
    "uuid": "5732da3b616843b19db7ff69598abf2c",
    "title": "ARSF Flight 2012_249 - for RG12_10: Hyperspectral Remote Sensing Measurements",
    "abstract": "Hyperspectral remote sensing measurements using the ARSF Optech Airborne Laser Terrain Mapper 3033 LIDAR, ARSF Specim AISA Hawk, ARSF Specim AISA Eagle and ARSF Rollei Digital Camera instruments onboard the NERC ARSF Dornier Do228-101 D-CALM Aircraft for the ARSF RG12_10 project (flight reference: 2012_249).\r\n\r\nData were collected over the Luton, UK area.\r\n",
    "keywords": "RG12_10, arsf, airborne, atmospheric measurments",
    "publicationState": "citable",
    "dataPublishedTime": "2018-02-05T15:55:54",
    "doiPublishedTime": "2018-02-22T16:11:00",
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/25820/?format=api",
        "dataPath": "/neodc/arsf/2012/RG12_10/RG12_10-2012_249_Luton",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 298262375205,
        "numberOfFiles": 1919,
        "fileFormat": "Hyperspectral data are ENVI Binary formatted, Lidar data are LAS formatted. Image files may be PNG or JPG formatted. Ancillary files may be plain ASCII or PDF formatted."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/6976/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/2179/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [],
    "dataLineage": "Data were collected by instrument scientists during the flight before preparation and delivery for archiving at the Centre for Environmental Data Analysis (CEDA).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/9511/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/25588/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/8604/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/25593/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/30129/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/107848/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/107849/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/107850/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/107851/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/107852/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/107853/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/107854/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/107855/?format=api"
    ],
    "procedureAcquisition": "https://api.catalogue.ceda.ac.uk/api/v2/acquisitions/25819/?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"
        }
    ]
}