用非相干的常规天气雷达提取多普勒速度谱宽——回波强度涨落谱分析
投稿时间:1987-02-01  修订日期:1988-01-18  点此下载全文
引用本文:
摘要点击次数: 623
全文下载次数: 467
作者单位
袁立功  
曹彦  
中文摘要:通常非相干的常规天气雷达的应用仅仅是通过雷达回波强度的探测来提供天气目标物的位置和其反射率的信息。本文在国产的非相干的713天气雷达上,对某一固定地点的降水回波进行了离散取样,应用微机(APPLE.Ⅱ)对所获取的离散样本作傅立叶变换(FFT),得到回波强度的涨落谱和谱宽。然后根据涨落谱与多普勒谱之间的确定关系,计算出在气象上非常有用的多普勒速度谱宽和典型的多普勒谱形。
 
EXTRACTION OF THE DOPPLER VELOCITY SPECTRAL WIDTH FROM CONVENTIONAL INCOHERENT WEATHER ECHOES——AN ANALYSIS OF THE FLUCTUATING SPECTRUM OF ECHO INTENSITY
Abstract:Usually, conventional incoherent weather radar is used to provide only the information on the position of a weather target and its radar reflectivity by detecting echo intensity. In this paper the fluctuating spectrum and its spectral width are estimated by fast Fourier transformation of the discrete sample of precipitation echoes at a specified position with a microcomputer(Apple Ⅱ) connected with a home-made incoherent weather radar 713. Based on the relation between fluctuating spectrum and Doppler spectrum, calculation has been performed for the width and shape typical of the Doppler velocity spectrum, which are very useful in meteorology.
查看全文  查看/发表评论  下载PDF阅读器