Weather data from the atmosphere above the earth's surface (greater than 3 meters to 1000s of meters above the surface) are stored at the NCDC. This data is obtained from instrument packages (radiosondes, rawinsondes, and rocketsondes) that are carried aloft by weather balloons, rockets, etc., that transmit the data back to a receiving station on the ground. This "upper air" data consists of temperature, relative humidity, atmospheric pressure, and wind. Vertical profiles of atmospheric measurements (atmospheric soundings) are available. Upper atmospheric data from around the world are archived at NCDC.
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