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/38238/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 38238,
    "uuid": "56742f742ea14edf872c3eca99f4a61a",
    "title": "ESA Land Surface Temperature Climate Change Initiative (LST_cci):  Monthly Multi-Functional Transport Satellite (MTSAT) level 3C (L3C) product (2009-2015), version 1.00",
    "abstract": "This dataset contains monthly averaged land surface temperatures (LST) and their uncertainty estimates from the Japanese Advanced Meteorological Imager (JAMI) onboard the Multi-Functional Transport Satellite series (MTSAT1 and 2, also known as Himiwari-6 and 7). The original surface temperatures are generated every 3 hours and in this L3C product are monthly averaged at each time step and distributed on a regular latitude-longitude grid with a resolution of 0.05ºx0.05º. The coverage is limited to land surfaces within the MTSAT disk, which encompasses Australia and part of Asia.\r\n\r\nThe LSTs in this dataset are estimated from infrared measurements using a single channel algorithm, and, therefore, are only available under clear-sky conditions. The quality of single channel algorithms is generally lower than dual channel ones, and users are advised to read the respective Validation Report for more information on the expected quality of these LST estimates.\r\n\r\nThe dataset was produced by the Portuguese Institute for Sea and Atmosphere (IPMA) as part of the ESA Land Surface Temperature Climate Change Initiative. The reader is referred to the LST_cci website for more information about how the data record was derived, and how to use the data and associated quality flags and estimated uncertainty.",
    "keywords": "land surface temperature, CCI, MTSAT",
    "publicationState": "citable",
    "dataPublishedTime": "2023-05-16T13:36:45",
    "doiPublishedTime": "2023-05-17T08:29:09",
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/39838/?format=api",
        "dataPath": "/neodc/esacci/land_surface_temperature/data/MTSAT_JAMI/L3C/v1.00/monthly",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 9254379736,
        "numberOfFiles": 601,
        "fileFormat": "Data are in NetCDF format"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/10321/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/3468/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62778/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62779/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62780/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62781/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62782/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62783/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62784/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62785/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62786/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62787/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62788/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62789/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62790/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62791/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/62792/?format=api"
    ],
    "dataLineage": "The data record has been produced by the Portuguese Institute for Sea and Atmosphere (IPMA) within the ESA Land Surface Temperature Climate Change Initiative (LST_cci) and supplied for archiving at the Centre for Environmental Data Analysis (CEDA). Level 1 satellite observations were provided by the Satellite Applications Facility on Land Surface Analysis (LSA-SAF).\r\nContact: data.lst-cci@acri-st.fr",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/12504/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/33361/?format=api"
    ],
    "observationcollection_set": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/182090/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/182088/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/182089/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/182091/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/182092/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/182093/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/182094/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/182095/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/182096/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": "https://api.catalogue.ceda.ac.uk/api/v2/composites/37379/?format=api",
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2558/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_lst_terms_and_conditions.pdf",
            "licenceClassifications": ""
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1140,
            "name": "ESACCI"
        }
    ]
}