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/40619/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 40619,
    "uuid": "dc11996a68c446abb342e917efdaac30",
    "title": "ESA Sea Surface Temperature Climate Change Initiative (SST_cci): Climatology Climate Data Record, version 2.2",
    "abstract": "This v2.2 SST_cci Climatology Data Record (CDR) consists of daily climatological mean sea surface temperature on a global 0.05 degree latitude-longitude grid, derived from the SST CCI analysis data for the period 1982 to 2010 (29 years). This climatology includes the post-hoc dust corrections from Merchant and Embury (2020) https://doi.org/10.3390/rs12162554.\r\n\r\nThe changes from climatology v2.1 are:\r\n* Inclusion of post-hoc dust corrections from Merchant and Embury (2020) reduces biases in affected regions (tropical Atlantic Ocean and the Mediterranean, Red, and Arabian Seas).\r\n* Improved compliance with CF Conventions.\r\n\r\nData are made freely and openly available under a Creative Commons License by Attribution (CC By 4.0) https://creativecommons.org/licenses/by/4.0/ . \r\n\r\nWhen citing this dataset please also cite the associated data paper: Merchant, C.J., Embury, O., Bulgin, C.E., Block T., Corlett, G.K., Fiedler, E., Good, S.A., Mittaz, J., Rayner, N.A., Berry, D., Eastwood, S., Taylor, M., Tsushima, Y., Waterfall, A., Wilson, R., Donlon, C. (2019) Satellite-based time-series of sea-surface temperature since 1981 for climate applications, Scientific Data 6:223. http://doi.org/10.1038/s41597-019-0236-x",
    "keywords": "SST, ESA Climate Change Initiative, CCI",
    "publicationState": "citable",
    "dataPublishedTime": "2023-10-05T12:54:52",
    "doiPublishedTime": "2023-10-05T12:54:29.179139",
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/40689/?format=api",
        "dataPath": "/neodc/esacci/sst/data/CDR_v2/Climatology/L4/v2.2/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 3449840495,
        "numberOfFiles": 366,
        "fileFormat": "Data are in NetCDF format"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/7406/?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/50415/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/50417/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/60312/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/60313/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/66256/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/66257/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/66259/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/66260/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/75579/?format=api"
    ],
    "dataLineage": "Data were processed by the ESA CCI SST project team and supplied to the Centre for Environmental Data Analysis (CEDA) for archiving in the context of the ESA Climate Data Centre and the National Centre for Earth Observation (NCEO).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/12715/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/11008/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/11005/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/30128/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197631/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197636/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197630/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197628/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197635/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197634/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197633/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197632/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197629/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/197948/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/11010/?format=api",
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2523/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_sst_terms_and_conditions_v2.pdf",
            "licenceClassifications": ""
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1140,
            "name": "ESACCI"
        }
    ]
}