降雨影响散射计测风的初步研究  

Effect of Precipitation on Scatterometer Ocean Wind Measurements

作　　者：杨吉龙[1] 张雪虎[1] 陈秀万[1] 柯樱海[1] Daniel Esteban James Carswell David JMc Laughlin Paul Chang Peter Black Frank Marks 

机构地区：[1]北京大学遥感与地理信息系统研究所 [2]Dept of Electrical &Computer [3]NOAA,USA

出　　处：《遥感技术与应用》2005年第1期157-161,共5页Remote Sensing Technology and Application

摘　　要：给出了降雨影响C、Ku波段微波散射计测量海面风速的初步结果。研究结果显示,海面风速为25～30m/s时,雨速为15mm/hr的降雨会使这两个波段的微波散射计测量的风速偏低10m/s。The Wind retrievals produced from microwave scatterometer are affected by the presence of rain. Quantifying the effect of rain on scatterometer wind measurements is important for increasing the applications of satellite scatterometry under extreme weather conditions such as those found in tropical storms and hurricanes/typhoons. A set of microwave remote sensing data collected with UMass Imaging Wind and Rain Airborne Profiler (IWRAP) during the 2002 Atlantic Hurricane Season has being analyzed by the Institute of Remote Sensing and Geographic Information System (IRSGIS) at Peking University (PKU), in collaboration with the Microwave Remote Sensing Laboratory (MIRSL) at University of Massachusetts (UMass), NOAA Hurricane Research Division (HRD) and NOAA National Environmental Satellite Data and Information Service (NESDIS). This paper presents preliminary results of precipitation effect on microwave scatterometry wind estimates at Ku band. The results show that microwave scatterometer underestimates the wind speed by up to 10 m/s for rain rate condition of 12 mm/hr and wind speed condition of 25 to 30 m/s for Ku bands, and up to 20 m/s when rain rate is higher than 16 mm/hr.

关 键 词：降雨效应 海面风场 微波散射计 飓风遥感 

分 类 号：TH765.2[机械工程—仪器科学与技术]