水下地貌调查测量精度提高方法研究

海洋调查中，为确保调查信息与实际位置相匹配，提高调查成果的可信度，必须提高作业船拖曳调查设备的定位精度。论述了基于超短基线（USBL）水声定位与差分全球定位系统（DGPS）组合的新方法，消除了因作业船频繁变向、潮流的流向及流速等造成的调查设备位置的测量误差，成功地解决了调查信息错位，提高了海底地貌调查的定位测量精度，实用性较强。

A Method for Raising Position Accuracy in Subsea Relief Survey

In order to advance the reliability of survey result and confirm the matching between survey information and position, it is necessary to advance the precise of survey equipment positioning in ocean survey. The paper discussed new method of underwater acoustic positioning integrated GPS based on USBL, it can eliminate survey error of equipment caused by vessel turning and tide. The method with better practicality solves the problem of the misplacement of survey information and improves accuracy for subsea relief survey.