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Uncertainty evaluation on field calibration results of AWS evaporation sensor |
Chen Tao1,2,Huang Xiaojing2,Li Xiaohong2 |
1.Heavy Rain and Drought Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province,Chengdu 610072; 2.Sichuan Meteorological Observation Data Center,Chengdu 610072 |
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Abstract A mathematical model is set up based on the field calibration method of AG ultrasonic evaporation sensor.By means of JJF1059.1-12012 Evaluation and Expression of Uncertainty in Measurement Standard and by measuring the uncertainty propagation theorem,the uncertainty of the field calibration results of the evaporation sensor is analyzed.According to different evaluation methods,the measurement uncertainty component is evaluated reasonably.And combined with the actual work of field calibration of automatic weather station for many years,the uncertainty evaluation on indication error of AG ultrasonic evaporation sensor is demonstrated.The standard uncertainty introduced by the repeatability of the indication is the main factor that affects the uncertainty of the measurement.
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Received: 22 March 2016
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