How Weather balloons and radiosondes work

I did my presentation on weather balloons and radiosondes. At first I thought a weather a balloon was a magical balloon that goes high in the air and and some how records data. But it is almost as simple as that, a weather balloon carries a radiosonde high up into the atmosphere, up to the edge of space. At that height the radiosonde that had been carried by the balloon has recorded vertical temperature, humidity, and pressure data. This information is sent back to a receiving station to use for local weather. Over 1,800 radiosondes that are attached to weather balloons are launched everyday. Radiosondes are a primary and cheap source for weather data around the world.