海洋二号(HY-2)卫星高度计已在轨运行两年多，亟需深入开展海面高度定标工作，基于全球定位系统（GPS）浮标的高度计海面高度定标法是主要的定标方法。GPS浮标定标法的定标精度受到时间窗口、浮标姿态、温盐以及相位中心等因素影响。为了提高高度计海面高度GPS定标法的定标精度，本文对影响GPS浮标测高精度的主要因素进行了分析研究。结果表明，在充分考虑影响因素基础上自主研制的GPS浮标高程测量精度可以达到1 cm，满足高度计海面高度定标要求。

Satellite altimeter was widely used in ocean monitoring and research, in order to find out the actual performance of the altimeter and access the accuratesea level data, we need to calibration. GPS buoys was mainstream devices in altimeter absolute calibration. Through simulation and experiment about the self-developed GPS buoy, this paperstudied the precision of GPS bouy and factors affecting.The results show that the self-developed GPS GPS buoy elevation measurement precision can reach 1 cm, meet the altimeter sea surface height calibration requirements.

1984年出生，男，河北安平县人，硕士，主要从事高度计定标检验及海洋测绘工作