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/39504/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 39504,
    "uuid": "abb030f60cf848278fe519379a2aaac9",
    "title": "Chapter 6 of the Working Group I Contribution to the IPCC Sixth Assessment Report - data for Figure 6.25 (v20221215)",
    "abstract": "Data for Figure 6.25 from Chapter 6 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).\r\n\r\n\r\nFigure 6.25 shows the effect of dedicated air pollution or climate policy on population-weighted PM2.5 (Fine particulate matter) concentrations (µg m-3) and share of population (%) exposed to different PM2.5 levels across 10 world regions.\r\n\r\n\r\n---------------------------------------------------\r\n How to cite this dataset\r\n ---------------------------------------------------\r\n When citing this dataset, please include both the data citation below (under 'Citable as') and the following citation for the report component from which the figure originates:\r\n Szopa, S., V. Naik, B. Adhikary, P. Artaxo, T. Berntsen, W.D. Collins, S. Fuzzi, L. Gallardo, A. Kiendler-Scharr, Z. Klimont, H. Liao, N. Unger, and P. Zanis, 2021: Short-Lived Climate Forcers. In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 817–922, doi:10.1017/9781009157896.008.\r\n\r\n ---------------------------------------------------\r\n Figure subpanels\r\n ---------------------------------------------------\r\n The figure has 30 panels with data provided for all panels in one single file.\r\n\r\n\r\n---------------------------------------------------\r\n List of data provided\r\n ---------------------------------------------------\r\n This dataset contains PM2.5 (Fine particulate matter) concentrations (µg m–3) and share of population (%) exposed to different PM2.5 levels across selected world regions.\r\n \r\n - Percentage of population exposed to PM2.5 Exposure threshold <= 10 microgram per m^3, including dust + sea salt.\r\n - Percentage of population exposed to PM2.5 Exposure threshold > 10 microgram per m^3 and<= 35 microgram per m^3, including dust + sea salt.\r\n - Percentage of population exposed to PM2.5 Exposure threshold > 35 microgram per m^3, including dust + sea salt.\r\n - Population weighted mean PM2.5 concentration [mean microgram per m^3]\r\n Regions: North America, Europe, Southern Asia, Eastern Asia, South-East Asia and developing Pacific, Asia-Pacific developed, Africa, Middle East, Latin America and Caribbean, Eurasia\r\n\r\n\r\n---------------------------------------------------\r\n Data provided in relation to figure\r\n ---------------------------------------------------\r\n All panels:\r\n \r\n - Data file: Fig_6.25_plot_data.csv\r\n - rows 4 to 54: left panels\r\n - rows 55 to 105: central panels\r\n - rows 106 to 156: right panels\r\n - column 2: white\r\n - column 3: light grey\r\n - column 4: dark grey\r\n - column 5: orange line\r\n\r\n ---------------------------------------------------\r\n Sources of additional information\r\n ---------------------------------------------------\r\n The following weblinks are provided in the Related Documents section of this catalogue record:\r\n - Link to the figure on the IPCC AR6 website\r\n - Link to the report component containing the figure (Chapter 6)\r\n - Link to the Supplementary Material for Chapter 6, which contains details on the input data used in Table 6.SM.3",
    "keywords": "PM2.5, air pollution, climate policies,  IPCC-DDC, IPCC, AR6, WG1, WGI, Sixth Assessment Report, Working Group 1, Physical Science Basis",
    "publicationState": "citable",
    "dataPublishedTime": "2023-03-01T17:00:29",
    "doiPublishedTime": "2023-03-22T11:05:45.505865",
    "updateFrequency": "notPlanned",
    "status": "ongoing",
    "result_field": {
        "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/39505/?format=api",
        "dataPath": "/badc/ar6_wg1/data/ch_06/ch6_fig25/v20221215",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 7457,
        "numberOfFiles": 4,
        "fileFormat": "Data are CSV formatted"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/10953/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/3731/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [],
    "dataLineage": "Data produced by Intergovernmental Panel on Climate Change (IPCC) authors and supplied for archiving at the Centre for Environmental Data Analysis (CEDA) by the Technical Support Unit (TSU) for IPCC Working Group I (WGI).\r\n Data files converted to CSV format by CEDA staff.\r\n Data curated on behalf of the IPCC Data Distribution Centre (IPCC-DDC).",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/12430/?format=api"
    ],
    "projects": [
        "https://api.catalogue.ceda.ac.uk/api/v2/projects/32705/?format=api"
    ],
    "observationcollection_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/observationcollections/32721/?format=api"
    ],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192668/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192669/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192670/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192671/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192672/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192673/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192674/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192675/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192676/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/192677/?format=api"
    ],
    "procedureAcquisition": null,
    "procedureCompositeProcess": null,
    "procedureComputation": "https://api.catalogue.ceda.ac.uk/api/v2/computations/39506/?format=api",
    "permissions": [
        {
            "ob_id": "https://api.catalogue.ceda.ac.uk/api/v2/observations/2528/?format=api",
            "useLimitation": null,
            "accessConstraints": null,
            "accessCategory": "public",
            "accessRoles": null,
            "label": "public: None group",
            "licenceURL": "http://creativecommons.org/licenses/by/4.0/",
            "licenceClassifications": "any"
        }
    ],
    "discoveryKeywords": []
}