大气科学2012，Vol.36Issue(3)：495-506,12.DOI:10.3878/j.issn.1006-9895.2011.11075
X波段双线偏振气象雷达反射率的衰减订正
Attenuation Correction of Reflectivity for X-Band Dual-Polarization Radar
摘要
Abstract
Strong attenuation in rain affects the detection accuracy and application of the X-band radar. This paper aims to seek a method of attenuation correction for X-band dual-polarization radar in precipitation. Before correction, the radar data are pre-processed with quality controls after analyzing all the methods from the past works, an attenuation correction algorithm is developed which is based on the self-consistent method with constraints; finally some validation methods are studied. Some comparisons are made between the corrected composite reflectivity of the X-band radar and a nearby S-band radar observed at the same time; moreover, the corrected relationships between KDP vs. Zh and Ah vs. Zh are also similar to the theoretical values predicted by scattering simulation. In addition, the authors also compare the corrected reflectivity with the surface rain-gauge observations. The analysis results indicate that the corrected reflectivity is more significant than the uncorrected one; specially for the larger area of rainfall (including convective rainfall) using the above attenuation correction algorithm for X-band radar, rainfall amounts can be estimated with higher accuracy.关键词
X波段双线偏振雷达/衰减订正/自适应约束算法Key words
X-band dual-polarization radar/rain attenuation correction/self-consistent method分类
天文与地球科学引用本文复制引用
毕永恒,刘锦丽,段树,吕达仁,苏德斌,陈羿辰..X波段双线偏振气象雷达反射率的衰减订正[J].大气科学,2012,36(3):495-506,12.基金项目
国家自然科学基金资助项目40930949,40227001,中国科学院知识创新工程重要方向项目KZCX2-YW-206 （）
