我国海洋二号卫星微波散射计数据处理软件设计

Design of data processing software for HY-2 satellite microwave scatterometer

我国第一颗海洋动力环境(HY-2)卫星于2011年8月16日发射上天,HY-2卫星微波散射计数据处理软件是用于生产海面风场矢量的软件,其作用是输入HY-2卫星经过预处理的散射计数据和辅助数据,进行时间标识、波束定位、几何参数计算、后向散射系数(σo)与辐射测量精度(Kp)系数计算、面元匹配、大气校正、海面风场反演等处理,输出具有固定格式的各级数据产品和/或图像产品。主要介绍该软件的结构设计、数据处理流程、接口设计和设计说明,该设计已经用于业务系统研发,软件处理的产品精度经过与浮标的比较,达到了预期的风速误差小于2 m/s、风向精度小于20°的要求,证明了该设计的正确性。

The HY-2 satellite was launched on August 16,2011,which is the first Chinese marine environmental dynamic satellite.The HY-2 scatterometer data processing software is designed to process HY-2 scatterometer data to wind vector product.The software uses the outputs of the pre-processing,including sigma0 and auxiliary data as the input data.By doing the time mark,beam location and geometry calculation,sigma0 and Kpcalculating for each pulse,sigma0 regrouping,atmospheric correction,wind retrieval,as well as ambiguity removal,the wind vector data and/or image data product can be produced.The software structure design,data process flow,interface design and design specification are described in this paper.The software design has been applied in the development of the operational data processing software for HY-2scatterometer.The RMS difference for the wind speed product is less than 2 m/s,while the RMS difference for the wind direction product is less than 20 degree,which indicates that the availability of the software design.