The Vaisala product page for their RadioSondes has a few pictures and datasheets (at the bottom) that are quite interesting - the RS41-SGPE has a transmitting d

The Vaisala product page for their RadioSondes has a few pictures and datasheets (at the bottom) that are quite interesting - the RS41-SGPE has a transmitting distance of 350KM and weighs 94 grams (probably without batteries) https://www.vaisala.com/en/products/weather-environmental-sensors/upper-air-radiosondes-rs41-rs41-e-models https://www.vaisala.com/en/products/weather-environmental-se... YouTube teardown: https://www.youtube.com/watch?v=3ikRJMeSUTI https://www.youtube.com/watch?v=3ikRJMeSUTI