The radiosonde is a small instrument package that is suspended below balloon filled with either hydrogen or helium. As the radiosonde is carried aloft, it measures pressure, temperature, and relative humidity.
These sensors are linked to a battery-powered radio transmitter that sends the information to a ground receiver. By tracking the position of the radiosonde in flight via GPS (Global Positioning System), measurements of wind speed and direction aloft is also obtained.
While primarily designed to assist with the tracking, recovery and re-use of meteorological radiosondes, it also provides a view of the meteorological data (for supported radiosonde types) gathered by these devices.
How to access the tracker
Default Mode: https://tracker.sondehub.org/ or https://sondehub.org/
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