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/40922/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 40922,
    "uuid": "076000199f64426bb6ad259925067b29",
    "title": "HadCM3 Climate Simulation - volcanic and solar forcing [ensemble] - original version with incorrect forcing.",
    "abstract": "The Natural Forcing (Volcanic and Solar) simulation contained in this dataset copied the control run (HadCM3-ctrl) with the addition of natural forcing from volcanic and solar sources. This dataset is the original version of this experiment that incorrectly introduced the volcanic aerosol and solar radiation spectrum - a subsequent run (HadCM3-NFVScorr) corrected the error.\r\n \r\n The Natural Forcing (Volcanic and Solar) simulation contained in this dataset copied the control run (HadCM3-ctrl) with the addition of natural forcing from volcanic and solar sources. This dataset is the original version of this experiment that incorrectly introduced the volcanic aerosol and solar radiation spectrum - a subsequent run (HadCM3-NFVScorr) corrected the error. The HadCM3 model was used by the Hadley Centre to provide input for the IPCC Third Assessment Report.\r\n \r\n Data members run for this experiment: ['abicd', 'abice', 'abicf', 'abicg']\r\n\r\n Boundary conditions: Essentially a repeat of the HadCM3 control run but including natural forcings from volcano and solar sources. The volcanic forcing data are taken from Sato et al. (1993) reconstruction of stratospheric volcanic aerosol optical depth at .55 microns. The solar forcing data was taken from the reconstruction of Lean et al. (1995).\r\nReferences: \r\nSato, M., J.E. Hansen, M.P. McCormick, and J.B. Pollack (1993) Stratospheric aerosol optical depth, 1850-1990. Journal of Geophysical Research, 98, 22987-22994..\r\nLean, J., J. Beer, and R. Bradley (1995), Reconstruction of Solar Irradiance Since 1610: Implications for Climate Change. Geophysical Research Letters, 22, 3195-3198.\r\n\r\n\r\n Initial conditions: The model is initialised from the control run with a different year for each of the four ensemble elements.\r\n[ABICD initialised with 1859 conditions from control]\r\n[ABICE initialised with 1959 conditions from control]\r\n[ABICF initialised with 2059 conditions from control]\r\n[ABICG initialised with 2159 conditions from control]\r\n\r\n More detailed metadata on the model configuration and parameters is available in XML format.",
    "keywords": "HadCM3-NFVSorig, HadCM3, forcings, solar, volcanic",
    "publicationState": "published",
    "dataPublishedTime": "2024-04-16T08:06:28",
    "doiPublishedTime": null,
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/40923/?format=api",
        "dataPath": "/badc/hadcm3/data/HadCM3_NFVSorig/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 107305911130,
        "numberOfFiles": 6621,
        "fileFormat": "HadCM3 data is provided in PP (post processing) format."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/11368/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/4008/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71374/?format=api",
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        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71376/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71379/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71381/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71382/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71383/?format=api",
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        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71385/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71386/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71388/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71389/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71390/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71392/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71393/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71395/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71396/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71398/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/71399/?format=api",
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    ],
    "dataLineage": "Data from the UK Met Office Hadley Centre. Dataset directory structure was reordered by CEDA staff in November 2023 to place experiment runs within a directory of their associated experiment.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/13847/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/3791/?format=api"
    ],
    "responsiblepartyinfo_set": [
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    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/40924/?format=api",
    "permissions": [
        {
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            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "restricted",
            "accessRoles": "link",
            "label": "restricted: link group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/specific_licences/ukmo_agreement.pdf",
            "licenceClassifications": "academic"
        }
    ],
    "discoveryKeywords": []
}