https://www.knmi.nl/kennis-en-datacentrum/publicatie/on-dropsonde-surface-adjusted-winds-and-their-use-for-the-stepped-frequency-microwave-radiometer-wind-speed-calibration
knmidropsondesurfaceadjustedwinds
https://www.foxweather.com/learn/what-is-a-dropsonde
Packed with instruments to measure things such as temperature and wind speed, dropsondes are a valuable tool when trying to build the most accurate forecast...
dropsondepringlessizedtubes