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Aiming at the lack of research on the uncertainty evaluation method of the calibration result of the electronic sonde base measuring box,the uncertainty evaluation method and the calculation method of the combined standard uncertainty and extended uncertainty are introduced.The calibration process of the six calibration items of temperature,air pressure,humidity,wind speed,output voltage and battery voltage of the electronic sonde base measuring box and the main measurement equipment used in the calibration process are analyzed,and the uncertain factors affecting the calibration results of each calibration item are analyzed.According to the relevant regulations and specifications,the calibration test is carried out for each calibration item of the JKZ1-1 electronic sonde base measuring box,and the uncertainty of the calibration result is analyzed and evaluated,and the calibration of each calibration item is obtained.The results meet the requirements.The research results can provide a certain technical basis for the laboratory calibration of the electronic sonde base measurement box,and provide a certain data support for the accurate assessment of weather forecast,climate analysis,scientific research and military-industrial activities, and international detection data exchange.