Get a list of Collections objects. Collections have a 1:1 mapping with Observations.

### Available end points:

- `/observationcollections/` - Will list all Collections in the database
- `/observationcollections.json` - Will return all Collections in json format
- `/observationcollections/<object_id>/` - Returns Collections object with that id

### Available Methods:

- `GET`
- `HEAD`

### Available filters:

- `uuid`
- `title`
- `keywords`
- `discoveryKeywords`
- `publicationState`

### How to use filters:

- `/observationcollections/?uuid=ab4ca8d019d148f78afba1cd20872bdd`

- `/observationcollections.json?publicationState=citable`

GET /api/v2/observationcollections/26538/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 26538,
    "uuid": "d491b9e869d845a3a727b569f95dde60",
    "title": "Sentinel 5 Precursor: Level 1 data",
    "abstract": "Level 1 radiance and irradiance data from the TROPOspheric Monitoring Instrument (TROPOMI) aboard the Sentinel 5P satellite. Sentinel 5P was launched on 13th October 2017. This satellite aims to provide atmospheric measurements relating to air quality, climate forcing, ozone and ultraviolet radiation. This data looks to build on the data from GOME, SCIAMACHY and OMI missions.",
    "keywords": "Sentinel 5P, TROPOMI, ESA",
    "discoveryKeywords": [],
    "publicationState": "published",
    "dataPublishedTime": "2022-11-03T08:22:35",
    "doiPublishedTime": null,
    "member": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/25900/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observations/26509/?format=api"
    ],
    "identifier_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111510/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111508/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111509/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111506/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111504/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111503/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111505/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111507/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111511/?format=api"
    ]
}