星载微波辐射计多通道海洋参数反演需要基于同一位置、同一分辨率的多通道观测值，但由于星载微波辐射计设计的局限性，多通道观测地面像元位置和分辨率均不同，因此运用多通道分辨率匹配技术统一观测面元是扫描微波辐射计数据处理中的关键技术，基于海洋二号（HY-2）卫星扫描微波辐射计的成像原理和天线方向图，模拟各通道天线方向图在地面的投影，用Backus-Gilbert（BG）算法将高频观测亮温重采样到最低的低频6.6 GHz通道的观测位置和像元分辨率。结果表明，BG降低分辨率重采样算法能得到很好的拟合效果，并且不另引入噪声。

Accuracy Satellite Scanning Microwave Radiometer ocean parameters retrieval need brightness temperature of multiple channel from same area and identical resolution. Due to the limitation of spaceborne radiometer antenna design and feedhorn arrangement, each channel has different resolution and observation position, this will increase the ocean parameter retrieval error. Based on the HY-2 Scanning microwave radiometer antenna pattern and imaging geometry, we simulate the ground footprint form different channel, use Backu-Gilbert(BG) algorithm produce a single composite sample at a particular location and with a particular spatial weighting pattern from combination of the adjacent measurements, the low frequency 6.6GHz is set as the reference channel. The result showed that the matching with resolution decreasing could simulate the real instrument observation without introducing noise.