Actual weather balloons transmit on internationally agreed common frequencies https://public.wmo.int/en/media/news/wmo-and-itu-update-radio-frequency-handbook h

Actual weather balloons transmit on internationally agreed common frequencies https://public.wmo.int/en/media/news/wmo-and-itu-update-radio-frequency-handbook https://public.wmo.int/en/media/news/wmo-and-itu-update-radi... Amateur radio operators monitor these frequencies https://tracker.sondehub.org/ https://tracker.sondehub.org/