差分GPS水下地形测绘关键技术研究

Some key techniques research in underwater topographic survey of DGPS

简要介绍了将差分GPS技术用于水下地形测绘的方法,重点研究了平面坐标转换和水深数据修正两个关键技术,给出了平面定位的坐标转换方法和考虑水温、含盐度等对声速的影响,以及海水潮位变化等因素后的水深测量修正方法。

This paper presents the application of DGPS (Differential Global Positioning System) in underwater topography, discussing two key problems of the plane coordinates transition and deepness datum modified. In consideration of the influenced velocity of sound due to the water temperature and salinity and changes of tide station, the velocity of sound and tide station. should be taken into account for deepness datum modified with time interpolation and distance interpolation for tide station modified.