论文部分内容阅读
我国新一代极轨业务气象卫星风云三号(02)批计划2012年发射。该文利用UWNMS模拟2005年Katrina飓风的结果作为基础数据集,借助VDISORT微波辐射传输模式对风云三号(02)批计划装载的微波探测仪器中50～60 GHz和新增的118.75 GHz频点的降水特性进行初步研究。首先通过晴空权重函数匹配,选择出50～60 GHz与118.75 GHz频点匹配关系较好的4对通道。敏感性分析表明:各通道对各种水凝物粒子均很敏感,可用于改进现有业务降水反演算法。分别选取50～60 GHz 4个通道、118.75 GHz 4个通道、50～60 GHz及118.75 GHz全部通道3种不同的通道组合进行反演试验。结果表明:将50～60 GHz及118.75 GHz通道联合起来进行降水反演可提高降水反演的精度,并可以更好地区分降水区与非降水区。
China’s new generation of polar orbit satellite weather meteorological situation on the 3rd (02) is scheduled to launch in 2012. In this paper, UWNMS is used to simulate the 2005 Hurricane Katrina results as a basic dataset. Based on the VDISORT microwave radiation transmission mode, the frequency of 50 ~ 60 GHz and the new 118.75 GHz frequency points in the microwave detection equipment of Fengyun III (02) Precipitation characteristics of a preliminary study. First of all, through the clear-sky weight function matching, we choose 4 pairs of channels with good matching between 50-60 GHz and 118.75 GHz. Sensitivity analysis shows that each channel is sensitive to all kinds of hydrometeors and can be used to improve the existing business precipitation inversion algorithm. Three different channel combinations of 4 channels at 50 ~ 60 GHz, 4 channels at 118.75 GHz, 50 ~ 60 GHz and 118.75 GHz were selected for inversion experiment. The results show that combining the 50-60 GHz and 118.75 GHz channels for precipitation inversion can improve the accuracy of precipitation inversion and make a better distinction between precipitation areas and non-precipitation areas.