基于船固坐标系的海底控制点定位方法研究

Study on Positioning Method of Submarine Control Point Based on Ship-fixed Coordinate System

海底控制点对于确定海面或水体中运动目标的位置起着重要的作用。该文提出了一种新的海底控制点定位方法。通过构建瞬时船固坐标系,结合海面星站差分GPS定位技术与水下声学定位技术,通过坐标转换,实现海底控制点的测定和位置计算。该测定方案能够有效消除传统作业模式中船只动态摇摆和涌浪等因素对定位的影响,在现有的技术条件下对海底控制点进行测量定位可达到较高的测量可信度。

Submarine control point plays an important role for determining the position of moving objects in the sea or water. This article proposes a new positioning method for submarine control point. By establishing a instantaneous ship-fixed coordinate system, combined with veripos GPS technique on sea and a- coustic positioning under water, through coordinate transformation, the calculating and positioning of sub- marine control point are realized. The measurement scheme can effectively eliminate the factors in traditional operation model, such as swing and surge, which can influence the positioning. Under the existing technology condition, this scheme can achieve a higher credibility on measuring and positioning for sub- marine control points positioning.