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Study on distortions of rainfall observed value of automatic weather station

Cui Minglei1,Yue Licheng2 (1.Huadian Meteorological Bureau of Jilin,Huadian 132400;2.Meteorological Information Technology Support Center of Jilin,Changchun 130062)  
Based on the rule of Meteorological Surface Observation,distortions of rainfall observed value of automatic weather station are studied.By means of carrying out wind prevention on SL3-I tipping bucket rain sensor,the drainage collection device of rainfall sensor Ⅱ is designed,and automatically collected drainage during precipitation process is realized.The reasons for distortion of rainfall observed value of automatic weather station are found,through contracting the rainfall value of automatic weather station,the drainage value of rainfall sensor and the rainfall value of manual conventionally observation.It provides a scientific,effective and objective method for accurate evaluation on rainfall observation of automatic weather station.
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