# CDS analyses data retrieval examplesAll data produced within the Copernicus Climate Change Service regional reanalysis for Europe and the pre-operational UERRA project are publicly available for download.This is an example of retrieving UERRA analyses data from one of the [CDS listed datasets](https://cds.climate.copernicus.eu/cdsapp#!/search?type=dataset&text=uerra). Please note that only the analyses are available via CDS. All other data (e.g. hourly forecasts) must be downloaded via the ECMWF MARS system. See examples in the ["mars_retrieve_examples"](./../mars_retrieve_examples/) folder.
Before running this script it is recommended to explore the available data and the corresponding CDS API requests by browsing the [CDS datasets](https://cds.climate.copernicus.eu/cdsapp#!/search?type=dataset&text=uerra).
The example provided here uses the python CDS API client.Information about prerequisites for running this example can be found at the [CDS website](https://cds.climate.copernicus.eu/api-how-to).## General informationThis project contains example code for users of the Copernicus Climate Change Service regional reanalysis for Europe (C3S_322_Lot1) data.
More information about the service can be found at the [Copernicus Climate Change Service regional reanalysis for Europe website](https://climate.copernicus.eu/copernicus-regional-reanalysis-europe-cerra).
The reanalysis data were initially produced within the FP7 pre-operational UERRA project.More information about the reanalyses systems and data can be found at the [UERRA website](http://www.uerra.eu/).