中国第一颗自主海洋动力环境卫星海洋二号（HY-2）卫星于2011 年8 月16 日成功发射，其上搭载的Ku波段微波散射计可以提供海面风矢量信息。根据国际上对已发射星载微波散射计在亚马逊热带雨林的研究结果：散射计在该地理区域观测的后向散射系数随季节的变化在0.15 dB以内。本文对HY-2 微波散射计2012—2013 年的亚马逊热带雨林区域的观测数据进行了分析，结果表明HY-2 卫星散射计在轨运行两年来的测量性能很稳定，其在亚马逊热带雨林的季节性变化特征与国际上的研究结果一致。

The first Chinese dynamic environment satellites HaiYang-2A(HY-2A) satellite was successfully launched on August 16, 2011, with a Ku-band microwave scatterometer which can provide wind vector information of global ocean surface. The research results for all launched scatterometer in the Amazon rainforest region by the global scientists showed the variance of scatterometer backscatter coefficient measurements was less than 0.15dB with the season. According to this results, the analysis on HY-2A microwave scatterometer measurement data of the Amazon rainforest region in 2012—2013 have been finished, the results showed that HY-2A satellite scatterometer measurement performance onboard in 2012-2013 is very stable, which is consistent with the international research results that seasonal variation characteristic of HY-2A scatterometer measurements in the Amazon rainforest is less than 0.15dB.