对双频高度计后向散射系数标准关系的修正  

Standard relationship adjustment of dual frequency altimeter backscatter coefficient

作　　者：姜祝辉[1] 黄思训[1] 刘博[1] 

机构地区：[1]解放军理工大学气象学院,江苏南京211101

出　　处：《解放军理工大学学报（自然科学版）》2011年第5期555-558,共4页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(40775023)

摘　　要：为了提高双频雷达高度计降雨情况下风速反演精度,确立合理的标准关系。采用Jason-1的7年半统计资料,通过多项式拟合的方法导出了新的标准关系。统计结果表明,该标准关系精度明显高于Quartly与Yang所建立的标准关系精度。该关系式为今后的双频雷达高度计的降雨反演提供了新的理论依据。在统计回归过程中,亦发现该标准关系可能有其他依赖项,将新的依赖项引入标准关系的构建可能会进一步提高标准关系的精度。The Ku band and C band backscatter coefficient standard relationship plays an important role in dual frequency altimeter wind speed retrieval when it is raining.To improve the precision of wind speed retrieval,it is very important to put forward proper standard relationship.A new standard relationship based on polynomial regression was advanced by comparing with the 7.5 years of data of Jason-1.Statistical results indicate that the new method is more accurate than Quartly＇s and Yang＇s standard relationship.This relationship provides new theoretical basis for wind retrieval when it is raining.During regression,the standard relationship may depend on other items,and the precession may improve if these items are taken into account.

关 键 词：双频高度计 后向散射系数 统计关系 

分 类 号：P407.7[天文地球—大气科学及气象学]