A radiosonde (Sonde is French and German for probe) is a unit for use in things such asweather balloons that measures various atmospheric parametersand transmits them to a fixed receiver. Radiosondes may operate at a radio frequency of 403 MHz or 1680 MHz and both types may be adjusted slightly higher or lower as required. A rawinsonde is a radiosonde that is designed to only measure wind speed and direction. Colloquially, rawinsondes are usually referred to as radiosondes.

Modern radiosondes measure or calculate the following variables:

  • Pressure
  • Altitude
  • Geographical position (Latitude/Longitude)
  • Temperature
  • Relative humidity
  • Wind (both wind speed and wind direction)
  • Cosmic ray readings at high altitude

Radiosondes measuring ozone concentration are known as ozonesondes.

Some photo taken during the search of a radiosonde.




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