what is the purpose of the radiosonde?

what is the purpose of the radiosonde?
Answer
Brief Explanations:
A radiosonde is a device used in meteorology. It is carried by a weather balloon into the atmosphere. It measures various atmospheric parameters like temperature, humidity, pressure, and wind speed/direction and transmits this data back to the ground - station.
Answer:
To measure and transmit atmospheric parameters (such as temperature, humidity, pressure, wind speed and direction) from the atmosphere to the ground - station.