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National Weather Service Portland-Gray Maine

Upper-Air Program Virtual Tour
National Weather Service Forecast Office
Gray, Maine


Introduction Equipment Inflation Baseline Launch RRS Conclusion


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The radiosonde must now be prepared by unpacking and inspecting the instruments sensors and attaching the flight information label. The radiosonde battery is water activated and can power the instrument for up to four hours. Once the battery is activated it is placed into the radiosonde to begin the process of baselining the radiosonde. During the baseline process, the radiosonde is being checked for accuracy and discrepancies and to ensure that the GPS is functioning properly. If the radiosonde does not pass the baseline criteria, it will be rejected and sent back the National Reconditioning Center.

Radiosonde being Baselined and Acquiring GPS Information

Radiosonde being Baselined and Acquiring GPS Information



Radiosonde baselined successfully, waiting for release detection

Radiosonde baselined successfully, waiting for release detection

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