气象与环境学报2012，Vol.28Issue(1)：77-81,5.
S波段双线偏振雷达K_（DP）参数计算的初步研究
A primary analysis of different algorithms of K_（DP） based on S band dual-polarization Doppler radar
摘要
Abstract
The KDP value detected by dual-polarization Doppler radar plays an important role in measuring rainfall and classifying hydrometeor.The KDP value was directly obtained from S band dual-polarization Doppler radar signal processor（RVP8）and its calculation process was not shown on the technical introduction,thus it was unfavourable to pretreatment and quality control of data.Three methods calculating KDP values were summarized.According to the observational data,the KDP values calculated by three methods were compared with those from signal processor（RVP8）.The results indicate that the error of the KDP value calculated by least square method is the minimum among the three methods.The effects of different smoothness distances along the radar radial on the KDP value with least square method are discussed.The relationship between the KDP value detected by radar and precipitation intensity calculated by Z-R relationship is analyzed.It shows that the smoothness distance to 5 km could retain not only the enough smoothness effect but also the enough meteorological information.Moreover,it does not influence the measurement of precipitation.The relationship between the KDP value and precipitation intensity is significant,especially in strong precipitation phase.Thus,the KDP value could be used to estimate precipitation intensity.关键词
双线偏振雷达/KDP算法/反射率因子/降雨强度Key words
Dual-polarization radar/Algorithm of KDP/Reflectivity factor/Precipitation intensity分类
信息技术与安全科学引用本文复制引用
胡鹏,胡明宝,张柽柽,杨金伟..S波段双线偏振雷达K_（DP）参数计算的初步研究[J].气象与环境学报,2012,28(1):77-81,5.基金项目
国家自然科学基金（41005018）资助 （）
