星载散射计资料反演带有气旋及锋面的复杂风场

Retrieve tropical cyclones and complex wind field using space scatterometer data

气象预报在确定热带气旋中的大风（风速17．2～20．7m／s）半径时，由于热带海洋地区在恶劣气候下缺乏现场数据，往往过高地估计了大风半径。星载散射计在探测海面上的风矢量的同时，也探测到许多热带气旋。本文利用Seasat－A卫星上的散射计（SASS）资料反演计算海面风暴的风矢量，并利用风速等值线进行风向多解排除，计算结果表明：星载散射计能探测到大风的阈值（17～18m／s），其准确度为2m／s或±10％（取大者）。

Weather forecasts specifying the radius of gale force winds (GFW) in tropical cyclones are limited by inadequate data and the results were found to consistently overestimate the radius of GFW. The space scatterometer (SASS) sensed surface winds associated with numerous tropical cyclones. The SEASAT-A satellite scatterometer (SASS) data was used to reverse of the sea-surface wind vector within the innor core of the storm in this paperThe removal ambiguity algorithm use wind speed contour direction as wind reference direction. The results indicate space scatterometer can detect the threshold of galee force winds (17~ 18m/s) with an accuracy ±2m/s or 10%.