有效波高是描述海况的重要参量之一，利用高度计遥感获取有效波高已在海洋研究中获得广泛应用。本文基于海洋二号（HY-2）卫星高度计波形数据，发展了一种高分辨率有效波高反演算法，采用中误差对反演得到的20 Hz有效波高进行筛选，有效提高了测量精度。通过该方法对1 个轨的波形数据进行有效波高反演，统计结果表明：与针对1 s 回波反演的有效波高比较，利用该方法可将有效波高观测分辨率提高约15 倍，精度约为0.44 m；利用HY-2 高度计20 Hz 波形数据反演的有效波高精度可靠，可用其进行高分辨率的相关海洋研究。

Significant wave height(SWH) is one of the important parameters which describe the sea state. The SWH derived from altimeter has been widely applied in marine research. Based on HY-2 altimeter waveform data, we develop an inversion algorithm of SWH with high-resolution. Using the RMSE condition to improve the accuracy 20 Hz SWH. Applied this method to one pass waveform data, the result shows the inversion algorithm is effective. Comparing the SWH derived from 1 s waveform, the SWH derived by this method could be increased by about 15 times the spatial and temporal resolution observations and the accuracy is about 0.44 m. The SWH derived from HY-2 altimeter 20 Hz waveform is reliable and could be applied for high resolution marine research.