B1 - Radio soundings

MeteoSwiss performs sounding twice a day (00:00 UTC and 12:00 UTC) from the sounding station in Payerne (station identifier PAY) using weather balloon radiosondes. The radiosondes measure temperature and humidity as well as its position and altitude using GNSS. Attached to a weather balloon and carried high into the atmosphere, wind speed and direction as well as atmospheric pressure can further be derived.

The data obtained in this way are of great importance for weather forecasts and climate research. The data collected during the radiosonde’s ascent are transmitted by radio to the receiving station in Payerne, where they are logged in the MeteoSwiss database. The results of the latest sounding are published either as graphs (emagrams) or as decoded data files.

1.1. Data granularity, update frequency, format and volume

The available file contains the data from the most recent sounding. The update frequency depends on the two soundings per day (at 00:00 UTC and 12:00 UTC).

Data format is CSV with an estimated volume of 0.02 MB per file.

See example data file for station PAY (set in lower case): ogd-radiosounding_pay_now.csv.

1.2. Parameter metadata and codes

See example parameter metadata file incl. codes for 'Profile Type', 'Level Type' and 'Solar Radiation Correction'.

The productive version will provide a parameter metadata file with the file name: ogd-radiosounding_meta_parameters.csv.

1.3. Station metadata

See example station metadata file.

The productive version will provide a station metadata file with the file name: ogd-radiosounding_meta_stations.csv.

1.4. Data visualisation

See e.g. MeteoSwiss' Emagrams.