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/26569/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 26569,
    "uuid": "cbc7f00cde514dfebfb8d75913ee4862",
    "title": "CURBCO2: Coupled Physical-biogeochemical ocean NEMO-HadOCC simulation output forced by GFDL-ESM2M atmosphere",
    "abstract": "This dataset contains coupled physical-biogeochemical ocean second generation Geophysical Fluid Dynamics Laboratory (GFDL-ESM2M) simulation outputs using the 1 degree NEMO-HadOCC model. The model output contains 3D Digital Image Correlation (DIC), alkalinity, temperature and salinity datasets at annualy-averaged frequency and monthly averaged surface ocean CO2 fugacities and fluxes.\r\n\r\n  Job IDs included in this dataset are:\r\n    GFDL-ESM2M surface fluxes (started on 19th July ~14h):\r\n    RCP85: u-ao541  (copy from u-ao419, change model names, restart + reduce walltime for nemo to test )\r\n    RCP26: u-ao551  (copy from u-ao541 and change rcp26 surface fluxes)\r\n    Constant atm CO2:\r\n    RCP85: u-ao552  (copy from u-ao541 with cst atm changes)\r\n    RCP26: u-ao554 (copy from u-ao551 with cst atm changes)\r\n\r\nThis data was collected in support of CURBCO2: Carbon Uptake Revisited - Biases Corrected using Ocean Observations, a Natural Environment Research Council (NERC) funded project (NERC Grant NE/P015042/1). The overarching aim of this project was to provide UK and international governments with the best possible impartial information from which they can plan how best to work towards the global warming targets (the 'Paris Agreement') set at the Paris Climate Conference in December 2015.",
    "keywords": "CURB, CO2, Oceans, alkalinity, temperature, salinity",
    "publicationState": "published",
    "dataPublishedTime": "2019-01-21T14:32:07",
    "doiPublishedTime": null,
    "updateFrequency": "",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/26570/?format=api",
        "dataPath": "/badc/deposited2018/curb/data/GFDL-ESM2M",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 105149493142,
        "numberOfFiles": 277,
        "fileFormat": "Data are netCDF formatted"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/7157/?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/22883/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50623/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50624/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50625/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/52949/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58090/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58091/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58092/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58093/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/58256/?format=api"
    ],
    "dataLineage": "Simulations were undertaken with the NEMO-HadOCC model ocean at 1 degree with HadOCC biogeochemistry and delivered to the Centre for Environmental Analysis (CEDA) for archiving.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/26554/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/26567/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111650/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111651/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111652/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111653/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111654/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111655/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111656/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111658/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111657/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/168843/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111659/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/111660/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/26555/?format=api",
    "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"
        }
    ]
}