Dropsondes look like ordinary tubular containers, but at NT $ 35,000 each they are rather expensive. Inside they are equipped with wireless transmitters, as well as sensors for air pressure, moisture, and temperature. They also contain GPS receivers and antennae, which combine the functions of calculating wind velocity, wind direction, and position.
「投落送」外觀看起來像羽球桶，每個造價新台幣 3 萬 5 千元，內部則配置無線電傳輸器，與氣壓、溼度、溫度感測器，及兼具計算風速、風向和定位功能的 GPS 接收器與天線。