测风气球净举力的计算和误差分析
THE COMPUTATION OF THE NET LIFTING FORCE OF PILOT BALLOON AND ERROR ANALYSIS
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摘要: 目前在气象和环保部门测量高空风向风速,常采用光学经纬仪跟踪气球的方法。单经纬仪测风或双经纬仪测风同时测垂直气流,以及气球进云后定低空探空仪的高度,均应采用升速已知的气球。Abstract: The net lifting force of pilot balloon has been computed by approximation method in this paper. A new table for this force is given based on the computations.The error of the lifting velocity caused by the net lifting force has also been computed.The results indicate that: in the old table which was currently used in the meteorological station, the error of lifting velocity does not follow a normal distribution, its maximum value was as high as 3.22m/min; the new table we suggested, the error is normaly distributed, its maximum and mean values are reduced to 1.36m/min and 0.05m/min respectively.
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. A, B、卡林诺夫斯基,高空气象学,22-38,顾钧禧等译,高等教育出版社,北京,1956. . 中央气象局,水平距离表,附表1-2,北京,1976. . 冯师颇,误差理论与实验数据处理,21-28,科学出版社,1964.
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