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双曲面模型深海三维定位数据模拟及精度分析 被引量:2

Observation Data Simulation and Positioning Accuracy Analysis of 3D Hyperboloid Positioning Model in Deepwater
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摘要 结合声波射线传播规律提出了双曲面模型水声定位的数据模拟方法。利用该方法模拟一定浮标网形下声源位于某区域约2 000m水深处10km×10km范围内的声线双曲面模型定位观测数据,进行定位解算,并将截止角的概念引入水声定位中。定位结果显示,大部分区域水下DGPS定位系统的外符合定位精度在水平方向优于5m,垂直方向优于10m;网形中间区域精度较高,三维定位精度为亚米级。引入角度限制后,定位区域内外符合定位精度水平方向优于1m,垂直方向优于4m。 Simulating method of hyperboloid model observation data, integrated with sound wave radial propagation law, is proposed in this paper. With this method, the data about 2 000m depth in sea in some regions overcast a square area with 1 kilometer length are simulated. Then, these data are computed with least squares method. The result shows that the outside fitting precision in most of the area is better than 5 m in level, and 10 m in vertical. Cutoff angles are imported to underwater positioning to restrict the sound radial. The result shows that the positioning precision of hyperboloid model in blue water can meet people' s needs in most cases. Thus, it is proved that hyperboloid model can be used in deepwater.
出处 《海洋测绘》 2008年第6期6-9,共4页 Hydrographic Surveying and Charting
基金 国家"863"计划(2006AA09Z201)
关键词 水声定位 深海定位 定位精度 截止角 acoustic positioning deepwater positioning positioning precision cutoff angle
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