用TOGA/COARE试验中机载雷达资料进行衰减效应订正的个案研究  

A Case Study of the Correction for Attenuation Effect Using the Airborne Radar Data Obtained During the TOGA/COARE Experiment

作　　者：窦贤康[1] 刘万栓[1] 胡先鹏[1] 

机构地区：[1]中国科学技术大学,合肥230026

出　　处：《电波科学学报》1998年第1期6-10,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金!49705058

摘　　要：为了最大限度地利用星载测雨雷达，必须实现一些主要条件：高的空间分辨率、宽阔的覆盖面积、大的动态降雨测量范围以及精确的点测量。但满足这些条件的雷达的工作频率段的电磁波穿过雨区就会受到衰减，再加上回波涨落的不确定性，因此必须修正这些因素所导致的误差。本文用1993年2月在西太平洋进行的国际大型科学考察实验TOGA／COARE中取得机载雷达（和星载雷达频率相近）实测数据进行衰减效应订正的个案研究，取得了和以往模拟相一致的结果。Among the various techniques for rainfall measurement, satellite remote sensing is recognized as the most effective and probably the only way to measure global rainfall. In particular,the spaceborne radar which can vertically profile the rain and its sensitivity is not degraded by high emissivities from the land background. In order to maximize the benefits of a spaceborne rain radar.some main requirements should be satisfied,i. e. high spatial resolution, wide coverage, large dynamic range for rain rate measurements and accurate point rainfall rate measurements. But the return power will be attenuated by the rain for the radar which satisfies the conditions above, so the algorithms have to be studied in order to correct the attenuation effect. This paper make a case study of the correction for attenuation effect using the airborne radar data obtained during the TOGA/COARE experiment since the radar operated at a similar frequency as the spaceborne radar.

关 键 词：比衰减因子 测雨雷达 反演算法 机载雷达 

分 类 号：P412.25[天文地球—大气科学及气象学]