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Sample of radiosonde recordNow that the radiosonde is up and away, the action shifts to the recording station. Here the temperature and humidity are recorded as the balloon moves to lower and lower pressure.

Every 10 millibars the barometer in the radiosonde switches sensors so for the first 10 millibars of pressure, the temperature is recorded. When the radiosonde moves to a lower pressure, the barometer switches to the humidity sensor while the radiosonde rises through this 10 millibars. At the top of the layer the barometer switches to the temperature sensor again. Except for occasionally switching to the internal drift calibration resistor, the barometer alternates between measuring temperature and humidity at different pressures.

final set of data The final set of data for this run is shown here. As before, click on the image for a close-up.

The next step during the days when this was done manually was to read the numbers off of the chart, plot them up and transmit the data to other meteorologists through the data lines. These steps, including the production of graphs like these, are now done by computer and automatic data processing programs. The only result that is seen on station is the final thermodynamic diagram such as the Stuve diagram or the Skew T-Log P diagram.


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Last Updated: March 26, 2004