The British Antarctic Survey (BAS) Vaisala RS92 radiosonde sounding system is operated at the King Edward Point launch site.

Vaisala radiosonde systems are used by meteorological organizations all around the world to measure weather in the Earth’s atmosphere, from the boundary layer to the upper atmosphere. The radiosonde is a lightweight, balloon-borne instrument that measures profiles of pressure, temperature and humidity from the ground to approximately 40 km. The radiosonde is equipped with a radio transmitter for sending the measurements securely to the observing station. The user has control over the sounding process by integrating sounding controls, archiving the sounding data and meteorological message creation. For routine soundings the system offers a variety of features and allows the desired balance of manual and automatic control. In addition to the traditional alphanumeric messages, the system software produces the WMO specified BUFR messages. This feature enables users to follow the WMO's recommendation to move from traditional alphanumeric codes to binary BUFR codes.