一种应用于X波段海洋监测雷达的插值算法研究

X波段雷达是海洋监测系统的重要组成部分,其提取的风、浪、流等海洋信息为渔业生产、港口货运、船只交通管理等生产活动提供了有力保障。海态参数提取需要进行二维插值,传统方法采用反距离加权的方法,但其精度有限。提出一种基于三角形线性插值算法,其先采用分治法实现Delaunay三角部分,再基于三角形线性加权估计函数值。将以上两种方法反演结果与浮标数据进行对比,并计算均方根误差、相关系数和平均耗时。结果表明基于三角形线性插值更精确,平均耗时略小。

A Study on Interpolation Algorithms Applied to Marine Monitoring of X-band Radar

X-band radar is an important composition of marine monitoring system, which can obtain ocean information (including wind, wave and current) to provide a powerful safeguard for production activities such as fishery production, port cargo, vessel traffic management. Two-dimensional interpolation is used to extract sea state parameters and the traditional method is inverse distance weighting, which precision is limited. This paper proposes a new method based on triangular linear, which is divided into two parts: divide and conquer method to realize Delaunay triangulation; estimate function value based on triangular linear. To analyze two methods above, we compare inversion results with buoy and calculate the root mean square error, correlation coefficient and average time cost. The results show that triangular linear interpolation is more precise and less average time cost.