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/44914/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 44914,
    "uuid": "db75c5f51ee240ae8743355dcebbb9b9",
    "title": "ESA Fire Climate Change Initiative (FireCCI): Harmonised Medium Resolution Burned Area Grid product, version 6.0 (MRBA60H)",
    "abstract": "The ESA Fire Disturbance Climate Change Initiative (CCI) project has produced maps of global burned area derived from satellite observations. The Harmonised Medium Resolution Burned Area grid product version 6.0 described here contains gridded data on global burned area derived from the harmonisation of two previous datasets: FireCCI51 and MRBA60 (previously known as FireCCIS311). This harmonisation has been done using machine learning techniques to try to approximate the FireCCI51 burned area to that of MRBA60 for the period when Sentinel-3 was not available (2003-2018). In that way, both datasets MRBA60H and MRBA60 can be used together in a consistent manner for time series analysis of burned area.\r\n\r\nThe description of the algorithm, input variables and validation results can be found in the Algorithm Theoretical Basis Document (ATBD) of the product in the linked documentation. The gridded dataset contains two variables: sum of burned area per month and per 0.25-degree grid cell, and the corresponding uncertainty, calculated as the Root Mean Square Error. For further information on the product and its format see the Product User Guide in the linked documentation.",
    "keywords": "ESA, CCI, Pixel, Burned Area, Fire Disturbance, Climate Change, GCOS, MRBA60H",
    "publicationState": "preview",
    "dataPublishedTime": null,
    "doiPublishedTime": null,
    "updateFrequency": "",
    "status": "planned",
    "result_field": null,
    "timePeriod": "https://catalogue.ceda.ac.uk/api/v2/times/13203/?format=api",
    "geographicExtent": "https://catalogue.ceda.ac.uk/api/v2/bboxes/529/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [],
    "dataLineage": "Data was produced by the ESA Fire CCI team as part of the ESA Climate Change Initiative (CCI) and is being held on the CEDA (Centre for Environmental Data Analysis) archive as part of the ESA CCI Open Data Portal project.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [],
    "projects": [
        "https://catalogue.ceda.ac.uk/api/v2/projects/13255/?format=api"
    ],
    "observationcollection_set": [
        "https://catalogue.ceda.ac.uk/api/v2/observationcollections/12683/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://catalogue.ceda.ac.uk/api/v2/rpis/215202/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/215203/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/215204/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/215205/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/215206/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/215207/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/215208/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/219654/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/215209/?format=api",
        "https://catalogue.ceda.ac.uk/api/v2/rpis/219655/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": null,
    "permissions": [],
    "discoveryKeywords": []
}