A radiosonde transmits via VHF  from as far away as 250km and as high as 60km atmospheric parameters such as wind speed and direction (3D), temperature and humidity. Shown here is a standard European made (Graw/Germany) radiosonde data display working with a cheap amateur radio SDR. The demodulated stream of bits can be seen in the upper right hand part of the software display
<a href="//commons.wikimedia.org/w/index.php?title=User:Paul_Wynter&amp;action=edit&amp;redlink=1" class="new" title="User:Paul Wynter (page does not exist)">Paul Wynter</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>