A radiosonde is a small, lightweight instrument used to measure atmospheric conditions. It is attached to a weather balloon and ascends into the atmosphere, collecting data on temperature, humidity, pressure, and wind speed. This information is crucial for weather forecasting and climate research. As the radiosonde rises, it transmits the collected data back to ground stations via radio signals. This process helps meteorologists understand weather patterns and predict changes in the atmosphere. Radiosondes are typically launched twice daily from various locations around the world, contributing to global weather monitoring efforts.