为了研究北部湾海洋潮汐的日变化规律,以及潮汐对海洋表面径向流的影响,利用岸基雷达对北部湾海域进行遥感探测。通过比较分析定点位置获取的海洋表面径向流信息,获得24小时内表面径向流参数的变化曲线。分析曲线得到北部湾海洋潮汐一天的变化规律,并从分析结果验证北部湾海洋是以半日流为主的潮汐海流。 In order to study the diurnal variation of oceans in the Beibu Gulf and the influence of tides on the radial flow on the surface of the ocean, the shore-based radar was used to detect the waters of the Beibu Gulf. By comparing and analyzing the information of the radial flow of the ocean surface acquired at the fixed point, the curve of the radial flow parameters within 24 hours was obtained. The curve of ocean tide changes in the Beibu Gulf will be obtained from the analysis curve. From the analysis results, it is verified that the ocean in the Beibu Gulf is a semi-daily tidal current.