Improved Grid Method and Its Application to Statistics of Lightning Parameters
Qin Binquan · Gao dianya jishu · 2012
To deal with disadvantages that the credibility and spatial resolution of lightning parameters calculated by traditional grid method(TGM)are not high enough,we proposed an improved grid method(IGM).IGM substitutes a couple of parameters(grid area and monitored radius)for the single parameter(grid area)in TGM.Taking lightning data recorded by lightning location system in Chongqing as an example,we illustrate the differences of the two methods in the statistics of thunderstorm day,thunderstorm hour and ground flash density.The results show that the three kinds of lightning parameters don't change sharply with the improvement of spatial resolution by the method of IGM,and the physics meanings of lightning parameters gained by means of IGM are clearer than the ones by means of TGM.Therefore,compared with the TGM,the spatial resolution and credibility of lightning parameters calculated by IGM is better,which can provide a good support for the differentiated lightning protection design.