Radiosonde Tracker

A radiosonde is a battery-powered telemetry instrument carried into the atmosphere usually by a weather balloon that measures various atmospheric parameters and transmits them by radio to a ground receiver. Modern radiosondes measure or calculate the following variables: altitude, pressure, temperature, relative humidity, wind (both wind speed and wind direction), cosmic ray readings at high altitude and geographical position (latitude/longitude). Radiosondes measuring ozone concentration are known as ozonesondes. Radiosondes may operate at a radio frequency of 403 MHz or 1680 MHz. A radiosonde whose position is tracked as it ascends to give wind speed and direction information is called a rawinsonde ("radar wind -sonde"). Most radiosondes have radar reflectors and are technically rawinsondes. A radiosonde that is dropped from an airplane and falls, rather than being carried by a balloon is called a dropsonde. Radiosondes are an essential source of meteorological data, and hundreds are launched all over the world daily. You can see the radiosondes in flight in real time on the world map.

Radiosonde Tracker

Data processing program

  • Based on kxyTrack 1.6 and MySondy 2.30

Active monitoring of the stations

  • Cameri (IT) 404.900 MHz

Radiosonde Frequencies Observation and Monitoring

  • All weather probes received from 400 to 406 MHz


  • Raspberry Pi 3 Model B+ Barebone (Made in EU)
  • Radiosonde Tracker - Based on kxyTrack 1.6-dxl_smod137
  • kxyTrack-Software and MySondy graphic processing
  • UHF Retevis MA01
  • Nooelec NESDR SMArTee v2 SDR - Premium RTL-SDR with Bias Tee Integrated
  • 403 MHz Filter
  • Low Noise LNA RF
  • Converter module from 12 to 5V DC 3A


  • Approximate coverage 300 km at free field

Latest detections (Real Time)