一种利用GPS实时动态定位获取水深的测量模型

本研究通过构建船固空间直角坐标系,借助GPS实时定位技术测定海底水深点的空间直角坐标,通过坐标转换,获得海底水深点高斯平面坐标和图载水深数据.该作业模式不仅无需验潮,而且能够有效消除传统作业模式中船只动态吃水和涌浪等因素对测量成果的影响,在实际测深作业中具有可行性.

Model of bathymetric survey based on GPS-RTK

By establishing the ship-fixed coordinate system,GPS receivers on ship can acquired the real time spatial right angle coordinates of the point at the sea bottom,which can be converted to Gauss plane coordinates and obtain water depth.By this method,the depth of each measured point relative to a specific vertical datum may be obtained without using a tide gauge.Furthermore,important error sources,which have resulted from the irregular vertical motion of the vessel such as heave,surge,etc.could be eliminated.