关键词: SWAN, 雷达拼图, 垂直积分液态水含量, 地物回波

Abstract:

Vertically Integrated Liquid ( VIL)indicates the total liquid water content in vertical column above the unit bottom area in cloud． It s very important for cloud water resources monitoring，weather warning，operation commanding and effect evaluation of weather modification． Ground clutter doesn t belong to meteorological factors，while it would affect the quality of both the basic data and export products． It has a serious impact on the quantitative application of radar data and must be identified and eliminated． By using radar mosaic VIL products of SWAN from June to August in 2011，an analysis was made on the characteristics of the ground clutter in southwest Hubei，and it was found that the location，size and shape of the ground clutter were relatively fixed． A method of eliminating ground clutter was proposed，firstly，the position index list of the ground clutter was build in southwest Hubei，then eliminating the ground clutter according to the list，finally the blank region after eliminating ground clutter was filled smoothly by recursion interpolation． It found that the method achieved good effects in statistical results for a certain number samples，which made the product more factually represent the horizontal distribution characteristics of VIL．

Key words: SWAN, radar mosaic, VIL;ground clutter