A Dropsonde sensor acquires a GPS signal prior to being deployed by the crew of a Coast Guard HC-130 Hercules airplane above the Beaufort Sea north of Alaska, Tuesday, July 16, 2013. The Dropsonde's temperature, humidity and wind readings were collected by the University of Washington's Polar Science Center team as it traveled from 10,000 feet to sea level. (U.S. Coast Guard photo by Petty Officer 1st Class Sara Mooers)
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