气象学报2011，Vol.69Issue(1)：161-169,9.
基于VAD技术的迭代法在实测多普勒速度缺测区域的填补研究
An iterative filling method for the lacking area in the observational Doppler velocity field based on the VAD technique
摘要
Abstract
The existence of the lacking region in the Doppler weather radar velocity field is one of the most important factors impacting the accuracy of velocity products.An iterative filling method based on the VAD technique is presented in detail under the assumption of the actual wind field of linear distribution.A filling test is conducted for the artificially created random discontinuous cumulative 10°-180° missing gap as well as the continuous cumulative 10° - 180° gap according the type of lacking area, based on the observational Doppler data.The analysis shows that the method is suitable for the random discontinuous cumulative gap within 180°and the continuous cumulative gap up to 110°.The average absolute error is in about 2 m/s compared with the original data.The linear interpolation method and the iterative method are also compared with each other under the two methods' prerequisite conditions met concurrently.The results show that the accuracy of the two methods are creditable.Relative to the sensitivity in the positive and negative turn of velocity data in linear interpolation method, iterative method should have a broader application.关键词
VAD技术/迭代法/填补技术/多普勒速度/缺测区域分类
天文与地球科学引用本文复制引用
夏文梅,徐芬,谢志清,慕熙昱,陈楠..基于VAD技术的迭代法在实测多普勒速度缺测区域的填补研究[J].气象学报,2011,69(1):161-169,9.基金项目
国家自然科学基金项目(40665001、40475017)、中国气象局新技术推广项目(CMATG2008M39). （40665001、40475017）
