The Bayes Decision (BD) method was used to distinguish the convective and stratiform components of cloud systems from GMS-4 satellite data. A technique originally developed by Adler and Negri (1988, hereafter abbrevia...The Bayes Decision (BD) method was used to distinguish the convective and stratiform components of cloud systems from GMS-4 satellite data. A technique originally developed by Adler and Negri (1988, hereafter abbreviated AN) was improved for estimating the convective and stratiform cloud precipitation areas and rates of cloud systems from GMS satellite imagery. It has been applied to a tropical cyclonic cloud cluster observed over east coast area of China on September 23, 1992, which brought about flood disaster in that region. Overlaid 6-hour surface rainfall observations show that the rainfall areas and amounts match with results from improved AN technique. The successful application of the Adler and Negri's technique to convective and stratiform clouds provides encouragement for the use of this method over large region of mid-latitude China where radar data are not fully covered.展开更多
In order to improve the accuracy of the rainfall measurement, a radar-radiometer system has been devel- oped. It could be used to measure the distribution of the rainfall intensity aLld the variation of area rainfall....In order to improve the accuracy of the rainfall measurement, a radar-radiometer system has been devel- oped. It could be used to measure the distribution of the rainfall intensity aLld the variation of area rainfall. In field experiment, the accuracy of the rainfall measurement was imporved. In this paper, the error of rainfall measurement by radar will be evaluated and the methods to improve the accuracy of the rainfall measurement will be discussed.展开更多
文摘The Bayes Decision (BD) method was used to distinguish the convective and stratiform components of cloud systems from GMS-4 satellite data. A technique originally developed by Adler and Negri (1988, hereafter abbreviated AN) was improved for estimating the convective and stratiform cloud precipitation areas and rates of cloud systems from GMS satellite imagery. It has been applied to a tropical cyclonic cloud cluster observed over east coast area of China on September 23, 1992, which brought about flood disaster in that region. Overlaid 6-hour surface rainfall observations show that the rainfall areas and amounts match with results from improved AN technique. The successful application of the Adler and Negri's technique to convective and stratiform clouds provides encouragement for the use of this method over large region of mid-latitude China where radar data are not fully covered.
基金Supported by National Natural Science Foundation of China
文摘In order to improve the accuracy of the rainfall measurement, a radar-radiometer system has been devel- oped. It could be used to measure the distribution of the rainfall intensity aLld the variation of area rainfall. In field experiment, the accuracy of the rainfall measurement was imporved. In this paper, the error of rainfall measurement by radar will be evaluated and the methods to improve the accuracy of the rainfall measurement will be discussed.
