GET

Observation Instance

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/30126/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 30126,
    "uuid": "3534bbf43fa14e40bc61944eaf664511",
    "title": "ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged methane from Sentinel-5P, generated with the WFM-DOAS algorithm, version 1.2",
    "abstract": "This product is the column-average dry-air mole fraction of atmospheric methane, denoted XCH4. It has been retrieved from radiance measurements from the TROPOspheric Monitoring Instrument (TROPOMI) on the Sentinel-5 Precursor satellite in the 2.3 µm spectral range of the solar spectral range,  using the Weighting Function Modified Differential Optical Absorption Spectroscopy (WFM-DOAS or WFMD) retrieval algorithm.   This dataset is also referred to as CH4_S5P_WFMD.\r\n\r\nThe WFMD algorithm is based on iteratively fitting a simulated radiance spectrum to the measured spectrum using a least-squares method. The algorithm is very fast as it is based on a radiative transfer model based look-up table scheme. The product is limited to cloud-free scenes on the Earth's day side.\r\n\r\nThis data was produced as part of the European Space Agency's (ESA) Greenhouse Gases (GHG) Climate Change Initiative (CCI) project.",
    "keywords": "ESA, CCI, satellite, Sentinel-5 Precursor, TROPOMI, atmosphere, methane, carbon monoxide",
    "publicationState": "citable",
    "dataPublishedTime": "2020-03-31T16:11:33",
    "doiPublishedTime": "2020-04-01T08:04:32",
    "updateFrequency": "",
    "status": "superseded",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/30125/?format=api",
        "dataPath": "/neodc/esacci/ghg/data/cci_plus/CH4_S5P_WFMD/v1.2/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 16714250286,
        "numberOfFiles": 376,
        "fileFormat": "Data are netCDF formatted."
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/8184/?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/54763/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/54764/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/55532/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/55533/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/63576/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/66973/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/66974/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68636/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/68637/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/69622/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/69623/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/69628/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/69634/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/69635/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74642/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74644/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74645/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74648/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74649/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74650/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74651/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74653/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74654/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74655/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74658/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74659/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/74660/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/phenomona/79736/?format=api"
    ],
    "dataLineage": "Data were processed by the ESA CCI GHG project team and supplied to CEDA as part of the ESA CCI Open Data Portal Project.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/10706/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/13295/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/12808/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130170/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130167/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130168/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130169/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130171/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130172/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130173/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130165/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130582/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130583/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130584/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/130585/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2564/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_ghg_terms_and_conditions.pdf",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": [
        {
            "ob_id": 1138,
            "name": "NDGO0003"
        }
    ]
}