Upper – Air observation is used to record the vertical profile of the atmosphere, information that is essential to create a global overview of the current and future state of the atmosphere. Bauerfield weather station have the instruments that can record atmospheric variables such as pressure, temperature ,humidity and wind speed and direction throughout the troposphere ( up to 18km above ground level ),and lower stratosphere ( 20 -30km above ground level ). One of the primary instruments for measuring upper – air variables is the radiosonde.

Radiosonde is a small measuring device that comprise a radio transmitter and sensor for pressure, temperature and humidity. It is normally carried aloft by a weather balloon filled with hydrogen. All data is then transmitted back to the ground station, where they are decoded and analysed. Bauerfield station released the radiosonde one time per day at 10 am local time.

The data from radiosonde are then shared to the forecasters and Bureau of Meteorology via Global telecommunications system network, which then provide input for local, regional and global numerical weather prediction models that forecast the future state of the atmosphere from a few hours to days ahead. Radiosondes provide upper –air data that are essential for weather forecast and research.