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/31733/?format=api

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

{
    "ob_id": 31733,
    "uuid": "7a17010ef0524672be3eb2fdf0ea5cb6",
    "title": "CHASER MIROC-ESM model data, part of the Chemistry-Climate Model Initiative (CCMI-1) project database",
    "abstract": "Model data from CHASER MIROC-ESM, the atmospheric chemistry coupled version of the MIROC Earth System Model, part of the International Global Atmospheric Chemistry (IGAC)/ Stratosphere-troposphere Processes and their Role in Climate (SPARC) Chemistry-Climate Model Initiative phase 1 (CCMI-1).\r\n\r\nCCMI-1 is a global chemistry climate model intercomparison project, coordinated by the University of Reading on behalf of the World Climate Research Programme (WCRP).\r\n\r\nThe dataset includes data for the following CCMI-1 experiments: \r\nReference experiments: ref-C1SD and ref-C2. \r\nSensitivity experiments: senC1SDfEmis, senC2fCH4, senC2fEmis, senC2fGHG, senC2fN2O and senC2fODS.\r\n\r\nref-C1SD: Similar to ref-C1 but the models are nudged towards reanalysis datasets, and correspondingly the simulations only cover 1980–2010. (“SD” stands for specified dynamics.)\r\nref-C2: Simulations spanning the period 1960–2100. The experiments follow the WMO (2011) A1 baseline scenario for ozone depleting substances and the RCP 6.0 (Meinshausen et al., 2011) for other greenhouse gases, tropospheric ozone (O3) precursors, and aerosol and aerosol precursor emissions.\r\nsenC1SDfEmis: Surface emissions such as nitrogen oxides (NOx ), carbon monoxide (CO), non-methane volatile organic compounds (NMVOCs), and aerosol precursors are prescribed at 1960 levels throughout, allowing the influence of meteorological variability on tropospheric composition to be established.\r\nsenC2fEmis: Similar to ref-C2 but with surface and aircraft emissions fixed to their respective 1960 levels.\r\nsenC2fGHG: Similar to ref-C2 but with greenhouse gasses (GHGs) fixed at their 1960 levels, and sea surface and sea ice conditions prescribed as the 1955–1964 average (where these conditions are imposed).\r\nsenC2fCH4: Similar to ref-C2 but the methane surface-mixing ratio is fixed to its 1960 value.\r\nsenC2fN2O: Similar to ref-C2 but the nitrous oxide surface-mixing ratio is fixed to its 1960 value.\r\nsenC2fODS: Similar to ref-C2 but with ozone-depleting (halogenated) substances (ODSs) fixed at their 1960 levels.",
    "keywords": "IGAC, SPARC, WCRP, CHASER, MIROC-ESM, CCMI-1, ref-C1SD, ref-C2, senC1SDfEmis, senC2fCH4, senC2fEmis, senC2fGHG, senC2fN2O, senC2fODS",
    "publicationState": "published",
    "dataPublishedTime": "2021-03-10T21:59:02",
    "doiPublishedTime": null,
    "updateFrequency": "",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/31734/?format=api",
        "dataPath": "/badc/wcrp-ccmi/data/CCMI-1/output/CHASER-MIROC-ESM",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 1899291578766,
        "numberOfFiles": 141618,
        "fileFormat": "NetCDF"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/8684/?format=api",
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    "nonGeographicFlag": false,
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    "dataLineage": "The CCMI-1 model output uses CMOR to convert data to CF netCDF. The CMOR conversion is performed by the individual modelling groups and the resulting CF netCDF files are archived at the BADC.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
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    "permissions": [
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            "useLimitation": null,
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            "accessCategory": "registered",
            "accessRoles": null,
            "label": "registered: None group",
            "licenceURL": "http://creativecommons.org/licenses/by/4.0/",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}