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

### Available end points:

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

### Available Methods:

- `GET`
- `HEAD`

### Available filters:

- `title`
- `uuid`
- `keywords`
- `instrumentType`

### How to use filters:

- `/instruments/?title__startwith!=Instrument.title: DETAILS NEEDED`
- `/instruments/?uuid=c7fa005e2095425392b18adbd7b40617`
- `/instruments.json?instrumentType=radiometer`

GET /api/v2/instruments/3540/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 3540,
    "uuid": "61199c12cda044458920a4a975d8fc05",
    "title": "Chilbolton Facility for Atmospheric and Radio Research (CFARR) Radiometrics Radiometer",
    "abstract": "A Radiometrics MP1516A Water Vapor Profiler operates continuously and provides measurements of the zenith sky brightness temperature at 21 frequencies in the range 22 to 30 GHz; this region of the microwave spectrum includes a water vapour absorption line. From these measurements the integrated water vapour and total liquid water at zenith are derived, together with the vertical profile of water vapour density.",
    "keywords": "",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/2395/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/2396/?format=api"
    ],
    "instrumentType": "asoz",
    "subInstrument": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/15019/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/15018/?format=api"
    ]
}