面向目标航迹融合的坐标变换运用技术

Coordinate Transformation Application Technology for Target Track Fusion

测量数据在大区域内投影变换不可避免地会引入偏差,如果不纠正这种误差,会影响航迹滤波和状态融合后目标位置、航向、航速的统计精度。文章提出以CGCS2000坐标系为基础的坐标变换运用方法,包括融合计算公共坐标系原点选择方法、目标状态误差协方差矩阵旋转模型。仿真分析结果表明,该方法在保持计算量不变的情况下,能够克服大区域情况下坐标投影给海上情报处理系统带来的正北指向误差和距离变形误差,提高航迹融合正确率和估计精度。

It＇s inevitable that the change of data in the large area will introduce the deviation, which will affect the tracking filter and the state fusion of the target position, course and speed, if the error will not be corrected. In this paper, it was based on the coordinate transformation method of the CGCS2000 coordinate system, including fusion computing public coordinate system origin selection method and target state error covariance matrix rotation model. Simulation result showed that the method under the condition of keeping the amount of calculation, could overcome the north pointing error and distance error because of large area cases. Therefore, the accuracy of track fusion and estimation precision were improved.