What is a sonde?

A sonde is a device or instrument used to measure and collect data about environmental conditions in various settings, such as the atmosphere, oceans, or soil. It can be used for various applications, including weather monitoring, oceanographic research, and environmental assessments. Typically, sondes are equipped with sensors that detect parameters like temperature, humidity, pressure, and salinity. Depending on the type, they can be deployed from aircraft, ships, or even handheld devices.